misc small changes:

- rename rna collection structs Main prefix to BlendData: eg, MainObjects --> BlendDataObjects
- printing python collection now prints its type (when available)
- renamed shadowed vars in bpy_rna.c.
- when making functions static I also made debugging/test functions static, reverse and add definitions to headers instead.

CMakeLists.txt

@@ -227,6 +227,7 @@ if(UNIX AND NOT APPLE)
 		# find_package(PythonLibs)
 		set(PYTHON /usr)
 		set(PYTHON_VERSION 3.1 CACHE STRING "")
+		mark_as_advanced(PYTHON_VERSION)
 		set(PYTHON_INCLUDE_DIRS "${PYTHON}/include/python${PYTHON_VERSION}" CACHE STRING "")
 		mark_as_advanced(PYTHON_INCLUDE_DIRS)
 		# set(PYTHON_BINARY python) # not used yet