Initial implementation of printf highlighting

Only those print functions that have the formatting string in the first position are enabled. Missing are: bprintf, fprintf, fprintfn, kbprintf, kfprintf, kprintf, ksprintf
Merge branch 'master' into printf

Conflicts:
	src/FSharpVSPowerTools.Core/SourceCodeClassifier.fs
	src/FSharpVSPowerTools.Logic/SyntaxConstructClassifier.fs
	src/FSharpVSPowerTools/SyntaxConstructClassifierProvider.cs
	tests/FSharpVSPowerTools.Core.Tests/SourceCodeClassifierTests.fs
Merge branch 'master' into printf

Conflicts:
	src/FSharpVSPowerTools/SyntaxConstructClassifierProvider.cs
Updated logo

This updates the logo to use the new F# Software Foundation logo for F#
instead of #.  For details, see http://fsharp.org/foundation/logo.html
Merge pull request #749 from ReedCopsey/master

Updated logo
Merge remote-tracking branch 'fsprojects/master' into printf

Conflicts:
	src/FSharpVSPowerTools.Core/SourceCodeClassifier.fs
	src/FSharpVSPowerTools.Logic/SyntaxConstructClassifier.fs
	src/FSharpVSPowerTools/SyntaxConstructClassifierProvider.cs
	tests/FSharpVSPowerTools.Core.Tests/Coloring.fs
	tests/FSharpVSPowerTools.Core.Tests/SourceCodeClassifierTests.fs
Merge remote-tracking branch 'fsprojects/master'
refactor folder organization and renaming stuff
refactor RenameDialog

address review
use ShowProgress type alias everywhere
Merge branch 'release'
Bump version
Merge pull request #750 from vasily-kirichenko/refactoring

refactor folder organization and renaming stuff
sync with upstream
Amend project load time for each ProjectProvider instance

Close #596.
Fix typo in error message
Merge pull request #752 from mleech/error-message-typo

Fix typo in error message
Merge pull request #751 from dungpa/loadtime

Amend project load time for each ProjectProvider instance
add Paket exe config files into .gitignore
ProjectProvider.FullOutputFilePath returns Option<string> since it cannot be available during VS closing