This is a pass of cleanup that renames some files to get rid of most cryptic abbreviations like "csolve", and does some other code cleanup and documentation too.

  - commenting in "detuple.fs"
  - removing ExtensibleDumper.fs which is an old adhoc debug mechanism barely used in the codebase
  - removing some dead code in fsc.fs (some code was already duplicated in fscmain.fs too!)
  - renaming check.{fs,fsi} --> PostInferenceChecks.{fs,fsi}
  - renaming tc.{fs,fsi} --> TypeChecker.{fs,fsi}
  - renaming opt.{fs,fsi} --> Optimizer.{fs,fsi}
  - renaming est.{fs,fsi} --> ExtensionTyping.{fs,fsi}
  - renaming build.{fs,fsi} --> CompileOps.{fs,fsi}
  - renaming fscopts.{fs,fsi} --> CompileOptions.{fs,fsi}
  - moving the option parser to CompileOptions.fs (where it belongs!)
  - marking some record types as RequireQualifiedAccess (to give better errors when editing the compiler)
  - removed a whole bunch of semicolons
  - removed some old debugging output (verboseStamps etc.)

closes https://github.com/Microsoft/visualfsharp/pull/357

commit 5e692365e8fb01f279aa7836dbd3e4d6e96fff0c
Author: Don Syme <donsyme@fastmail.fm>
Date:   Mon Aug 3 14:09:33 2015 +0100

    restore code that should not have been removed

commit 7e8eda59c2929b2cfc55f24a7c96cec28994e892
Author: latkin <latkin@microsoft.com>
Date:   Fri Jul 31 18:15:49 2015 -0700

    Fix expected text in Watson test

commit 248a14c766e48e42e8c6c354ba28eaaaba650ac6
Merge: 4767d5b dd8252eb
Author: Don Syme <donsyme@fastmail.fm>
Date:   Thu Jul 9 16:42:28 2015 +0100

    integrate & merge with latest HEAD

commit 4767d5b506b3023de5e172b4dd636cbbd726873d
Author: Don Syme <donsyme@fastmail.fm>
Date:   Fri Apr 10 17:25:23 2015 +0200

    update to force appveyor

commit 0600f3eff57b1a378bb888ae52156d7eee9f53ce
Author: Don Syme <donsyme@fastmail.fm>
Date:   Fri Apr 10 16:52:21 2015 +0200

    update to force appveyor

commit 02c6c6cb2659b9b37e99066f9517ad00bb697702
Author: Don Syme <donsyme@fastmail.fm>
Date:   Fri Apr 10 16:38:12 2015 +0200

    update to fix build

commit 877a1d2083328bbc0f6e65626ebd22a7da05f568
Author: Don Syme <donsyme@fastmail.fm>
Date:   Fri Apr 10 16:30:50 2015 +0200

    update to fix build

commit dd886be184867f7ee404bd3aa7b2f45480702186
Author: Don Syme <donsyme@fastmail.fm>
Date:   Fri Apr 10 14:03:02 2015 +0200

    update to fix build

commit 4f73a2b1363a1dd1d9ba1e72d6eb856a50cf078b
Author: Don Syme <donsyme@fastmail.fm>
Date:   Fri Apr 10 13:46:02 2015 +0200

    update proto (4)

commit 5430936c1deae5258f3ba5d393435b12619752cf
Author: Don Syme <donsyme@fastmail.fm>
Date:   Fri Apr 10 13:44:10 2015 +0200

    update to fix build

commit 93d94c9918886a7a555e514287d84139f9acd915
Author: Don Syme <donsyme@fastmail.fm>
Date:   Fri Apr 10 13:35:15 2015 +0200

    update proto ()

commit 77fa7acf7d4eacb8602a0e61ef130a3482ca85c6
Author: Don Syme <donsyme@fastmail.fm>
Date:   Fri Apr 10 13:31:35 2015 +0200

    update proto and renamings

commit 8797a81bfc8009412d6875b9091b9cb786e785ba
Author: Don Syme <donsyme@fastmail.fm>
Date:   Fri Apr 10 13:05:09 2015 +0200

    integrate cleanup with  fsharp4 (2)

commit 31777c7fbf0f8e59fd8ef8967b618ecf76aa2b7b
Merge: c6ffdb62 bb09bb3
Author: Don Syme <donsyme@fastmail.fm>
Date:   Fri Apr 10 12:43:00 2015 +0200

    integrate cleanup with  fsharp4

commit bb09bb38641fc19a2e520930ab655a047341808b
Author: Don Syme <dsyme@microsoft.com>
Date:   Mon Dec 1 09:53:04 2014 +0000

    remove more semicolons in ilwrite.fs

commit a3ca1554da44bbd3563aa727d1e75f7f5ad1596e
Author: Don Syme <dsyme@microsoft.com>
Date:   Sun Nov 30 20:23:14 2014 +0000

    code cleanup inn ilwrite.fs and il.fs

commit f2e301e85ded692434319b09e69250eca7a37c26
Author: Don Syme <dsyme@microsoft.com>
Date:   Sun Nov 30 15:54:21 2014 +0000

    cleanup and rename build.fs and fscopts.fs

commit 20cb9b0bf32d01cce556e37edee1ab075051c4a5
Author: Don Syme <dsyme@microsoft.com>
Date:   Sun Nov 30 00:19:12 2014 +0000

    make some more functions into members in tast.fs

commit ddadb30cd4dea8649464a3ca461a516dd0e89b16
Author: Don Syme <dsyme@microsoft.com>
Date:   Sat Nov 29 23:31:17 2014 +0000

    additional cleanup in tast.fs (2)

commit 662d87c9ac87ac6e8aaf0e3694653585c722d3fc
Author: Don Syme <dsyme@microsoft.com>
Date:   Sat Nov 29 23:25:14 2014 +0000

    additional cleanup and comments in tast.fs

commit a27f527bc5f13ac561dc9b6ac7c880b17f6df7c2
Merge: 79b8293 4f943472
Author: Don Syme <dsyme@microsoft.com>
Date:   Sat Nov 29 20:37:10 2014 +0000

    Merge branch 'master' of https://git01.codeplex.com/visualfsharp into master-cleanup-1

commit 79b8293c6c0b48482de3d7b208489f2ce9c9ec9d
Author: Don Syme <dsyme@microsoft.com>
Date:   Sat Nov 29 20:35:26 2014 +0000

    code cleanup and file rename