Improved Lua API (lua_read_parse has been removed in favour of the
conky_parse() Lua API call). The docs have been improved to reflect the
recent Lua API stuff as well. Introduced new Lua Cairo and Imlib2
bindings, which require the tolua++ tool. Fixed some other
miscellaneous doc related things.
Added the (incomplete) check_docs.py, to 'synchronize' the docs with the
code, as well as vim/nano syntax stuff.
Removed some unused OBJ_* stuff from text_objects.h, and updated docs
with some missing things. Also removed a couple deprecated objects
which were still documented.
