Make include-what-you-use happy with some files in source/lib and fix
what needs to be fixed.
Ref: #8086
Signed-off-by: Ralph Sennhauser <ralph.sennhauser@gmail.com>
- use wrapper class instead of std::wstring (reduces mixing of
strings/paths; allows safe+easy join via operator/ and convenient
case-insensitive comparison via operator==, avoids NativePathFromString,
similar to boost::filesystem)
- NativePath -> OsPath
- add hash and To/FromJSVal for Path
- add TS_ASSERT_PATH_EQUALS
- replace _wfopen_s with sys_OpenFile
- remove obsolete SortFiles/Directories
This was SVN commit r9107.