Use std::streamoff instead of long

Fixes a warning
Tweak the performance tests.
Fix the number of items added to the tree
texture unit needs to be the same between push and pop
MOD: Renaming parameter, adding getter function
MOD: Moving type specification to where it is in other CEGUI classes
MOD: Adding pointer list getter for SectionSpecifications
MOD: Adding getter for LayerSpecification container including a comparator
MOD: Formatting the cpp file to CEGUI standards
MOD: Formatting the cpp file to CEGUI standards
MOD: Undoing ABI/API-break of previous commit d057944
Merging heads
MOD: README improvements
DOCU: Renamed v-0 to v0 in the Readme
MOD: Fixing StateImagery getter and adding docu and removing old type
ogre static libs for samples
PyCEGUI PropertyHelper missing methods and {Layer,Section}SpecificationVector added
Fixing linker issues regarding the deprecated S_parentIdentifier symbol

The definition has to be non-static, otherwise it's limited to the one source file.
Merged in david_reepmeyer/ceguilinux_ogre_static-v0-8/v0-8 (pull request #113)

ogre static libs for samples
Numbered beginners tutorials so that it's more apparent they are related