Updated architecture overview
Updated architecture overview

RevBy: Jon Nordby
Use proper names, clarify text. Made the overview diagram a bit more
complex, to tell the "full" story. Mention self-compositing, preedit/commit
strings and GTK+ support.

sil2100/maliit-framework,RHawkeyed/framework,jpetersen/framework,RHawkeyed/framework,Elleo/framework,sil2100/maliit-framework,jpetersen/framework,sil2100/maliit-framework,sil2100/maliit-framework,Elleo/framework,binlaten/framework