* Add IL output option for deterministic output

Thread a new option through the options to the code writing the IL.
For the moment just use a constant for deterministic timestamp, and use 0 as the timestamp in the MVID

* Basic check to prevent wildcard version + deterministic at the same time

* Hash the code, data and metadata, and use for mvid + timestamp

* Fix fsc & fsci help tests by adding in new command line option for deterministic

* tests for command line, wildcard versions, normal non-deterministic behaviour

* Attempt to get CI to support timeout

* Allow PRECMD to call FSI more than once, and use this for copying files and pausing to prevent race-condition

* PortablePdbBuilder use consistent id 

If compiling deterministically, use deterministic id provider support in 
making a pdb builder. see https://github.com/dotnet/roslyn/blob/master/src/Compilers/Core/Portable/PEWriter/PeWriter.cs#L132

* Portable and Embedded pdb now deterministic

* wip: fix up timestamp in pdb, but mvids still out of sequence

* Fix breaking change from rebasing on master

* Add notes about determinism with non portable pdbs
Make the checks for finding embedded guids more
strict and unique

* Throw error if determinsitc build and non-portable pdb specified

* Better error message for pattern matching

* Better error message for pattern matching guards

* fix test

* Test pattern match guards

* s/return type/have type

* cleanup

* Fixes #3170

* Adding a test

* Rename targets --part1

* Rename targets --part1

* Microsoft.FSharp.Targets has a T as does Microsoft.Portable.FSharp.Targets

* dotnet SDK uses the msbuild TargetFramework property, so we need to change our build a bit.  Renaming it to TargetDotnetProfile in our files

* Overeager renaming

* Don't forget the mono stuff

Remove weird recursive function

Better error message when we forgot . in dictionary access

* Better error message for list/array init

* add comma

Try to clean up error text a little.

spelling error for DisableImplicitSystemValueTupleReference and not using DisableImplicitFSharpCoreReference (#3166)

Better indexer detection

* Give better error message when IF Statement has context requirements

* simplify code

* Update TypeChecker.fs

* something has a type

* Adding a test

* Transitive IF context

* Another test - fixes #3146

* fix wording

Adding features since last update.