Rename "devstudio" folder to "msvc" (Microsoft Visual C++).
Done to make the naming scheme more consistent.
Also rename "devstudio" test folder to "msvc".
Rename DevStudio2005CCompiler class to Msvc2005CCompiler.
Rename DevStudioCCompiler to MsvcCCompiler.
Rename DevStudioCompatibleCCompiler to MsvcCompatibleCCompiler.
Rename DevStudioCompatibleLibrarian to MsvcCompatibleLibrarian.
Rename DevStudioCompatibleLinker to MsvcCompatibleLinker.
Rename DevStudioLibrarian to MsvcLibrarian.
Rename DevStudioLinker to MsvcLinker.
Rename DevStudioMessageCompiler to MsvcMessageCompiler.
Rename DevStudioMIDLCompiler to MsvcMIDLCompiler.
Rename DevStudioProcessor to MsvcProcessor.
Rename DevStudioProjectWriter to MsvcProjectWriter.
Rename DevStudioResourceCompiler to MsvcResourceCompiler.
Move test files to parent folder.
Fixes accidental subdirectory introduction in commit 1094518a60fc0971c1810774087e40dd803af93b.
Rename TestDevStudio2005CCompiler to TestMsvc2005CCompiler.
Rename TestDevStudioCCompiler to TestMsvcCCompiler.
Rename TestDevStudioLinker to TestMsvcLinker.
Rename TestInstalledDevStudioLinker to TestInstalledMsvcLinker.
Merge pull request #123 from forderud/msvc

Rename "devstudio" folder to "msvc"