lots of cleanups to the pango code, which was a very nice base to start from. thanks to whomever wrote that for us.. put some of the pango variables into the various render structs so that they don't need to be created all the time. put the pango context inside our RrInstance so that it can be properly freed at shutdown. removed xft dependencies all through the code and the build system also. who knows if this will break compiling for some poor souls. i guess we'll find out, won't we!
lots of modifications to the render API, prefixing everything, making proper
names for everything. the structures are not hidden/opaque yet, but the naming scheme of the public API works much better now.
