I moved the weather stuff into its own thread, and also fixed up some
abuse of <simplelist> formatting throughout the docs. Hopefully we can
keep things a little more uniform from now on.
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.
