2012-08-03  Natalia Portillo  <claunia@claunia.com>

	* Plugins/ODS.cs:
	* Plugins/HPFS.cs:
	* Plugins/ISO9660.cs:
	* Plugins/AppleMFS.cs:
	* Plugins/AppleHFS.cs:
	* Plugins/AppleHFSPlus.cs:
	  Moved datetime conversion to DateHandlers class.

	* Plugins/Symbian.cs:
	  Identifies .SIS files. Yes I know it's not a filesystem but
	  I needed it so.

	* Main.cs:
	  Corrected typo

	* FileSystemIDandChk.csproj:
	  Added datetime conversion handling class, Symbian .SIS
	  installers, ext filesystem and ext2/3/4 filesystems.

	* Plugins/ext2FS.cs:
	  Detects ext2, ext3 and ext4 filesystems up to Linux 3.1
	  kernel.

	* Plugins/extFS.cs:
	  Detects ext filesystems. Untested as no Linux 2.0 was
	  available at time :p

	* DateHandlers.cs:
	  Moved all datetime convertions from plugins to central
	  class.