General build cleanup

Re-generate /build/buildupdate.mono.sh and /build/buildupdate.win.sh
Consolidate .sln files => Palaso.sln
Remove unused files: PalasoError, Palaso.sln, .hgignore, buildupdate.sh
Since exiftool.exe is replaced with taglib-sharp, remove exiftool from build configuration along with the FileLocatorTest for exiftool
Update GetAndBuildThis.bat to handle VS2013 / VS2010
Update CopyTo*.bat to use relative directory paths
Fix SIL.ScriptureUtils output dirs on Mono