As discussed in #1505

More Information
http://blogs.msdn.com/b/msbuild/archive/2008/02/11/what-s-up-with-xxx-sln-cache.aspx

As of Visual Studio 2015 CTP5 the Roslyn cache and suo files are stored in a .vs/ directory.

Ignoring *.cache as well as *.Cache

Revert "adding entry for ignoring <solutionname>.sln.ide folder which contains visual studio 2015 solution specific cache data"

This reverts commit b07a0904.

adding entry for ignoring <solutionname>.sln.ide folder which contains visual studio 2015 solution specific cache data

I haven't found good documentation for this file online, but it is a user based file that should be ignored.

This files is generated by Visual Studio 2013 and should be ignored.

user passwords are stored in *.user files so it is only database connection strings that are not protected.

https://github.com/github/gitignore/commit/08def965cd1c0241a7cffbe7c26a74b3cab61243 incorrect states that commenting *.pubxml will keep your passwords hidden when it will actually do the opposite. This clarifies what commenting *.pubxml does and warns you of the dangers.

Amends #1131
See these resources for explanation:
  http://docs.nuget.org/docs/reference/package-restore
  http://docs.nuget.org/docs/workflows/using-nuget-without-committing-packages

Removed the separate top-level patterns for NuGet in accordance with comments in PR. Will now match version 2.0.1.

Fixed pattern for excluding nuget packages so that it works both for top level package folder and for any lower level package folders.  Re-include patterns fixed the same way.

When installing SQLite embebed on my C# project I've noted that it generates both directories,
`x86` and `x64` but only `x64` was present on `.gitignore`.