ProjectProvider.GetProjectCheckerOptions sets ProjectOptions.ReferencedProjects and alters ProjectOptions.ProjectOptions
fixed: wrong value was assigned to ProjectOptions.ReferencedProjects

check ProjectOptions.ProjectOptions and ProjectOptions.ReferencedProjects consistency
refactor ProjectProvider.GetProjectCheckerOptions
Merge pull request #410 from vasily-kirichenko/set-ReferencedProjects-in-project-options

ProjectProvider.GetProjectCheckerOptions sets ProjectOptions.ReferencedProjects and alters ProjectOptions.ProjectOptions
Rename backing fields of Implement Interface

It generates fresh registry keys for the feature so this feature will be
enabled by default on users' machines.
Update docs for Implement Interface
update implement_interface.gif
Merge pull request #3 from vasily-kirichenko/update-docs

update implement_interface.gif
Merge pull request #413 from dungpa/update-docs

Update docs
Merge remote-tracking branch 'fsprojects/master' into virtual-file-system

Conflicts:
	src/FSharpVSPowerTools.Core/LanguageService.fs
	src/FSharpVSPowerTools.Logic/ProjectProvider.fs