Improved VFS
- Implemended vfsDir.
- Improved vfsDevice.
- Improved vfsFile.
Fixed cellFsOpen & cellFsOpendir
Few source-code improvements

* Fixed identation inconsistency after last merge.
* Replaced uint32_t with u32 in LinearToSwizzleAddress.
* Replaced hardcoded values with defined GCM constants (in Emu/GS/GCM.h)
in some switch statements.

This commit won't produce any changes in the RPCS3 executable. It's just
to make the code easier to read.
Merge branch 'master' of https://github.com/DHrpcs3/rpcs3

Conflicts:
	rpcs3/Gui/GameViewer.cpp
Merge branch 'master' of https://github.com/DHrpcs3/rpcs3