made all libdata hashable - use the object type,name and lib for the hash.
added .tag to libdata so we can test if data's been processed without using dictionaries
added libdataseq.tag (write only) setting the tag flag (which can always be dirty)
removed most custom add_*data* wrappers from Main.c
removed makeCurrent() from Text.c (was never in a release), use "bpy.texts.active = text" now
clamp new image sizes
made add_empty_action accept a string rather then a blocktype since the blocktype was only being used to choose one of 3 strings anyway.
* Added bpy.*.new() - works for all except sound and font types
* Added bpy.*.load() - works for sound, font and image types
Text3d - removed unneeded check.
* Added data.lib attributes to almost all data types, (except for Text3d and NLA)
This is None or the path of the library as a string.
* Main was giving a warning, Include Curve.h rather then CurNurb.h
* Added Library.LinkedLibs(), returns a list of externaly linked libs.