Improve CamelCase to lower_case transformation
Improve CamelCase to lower_case transformation

Fixes bug 585718.

severinh/vala,GNOME/vala,GNOME/vala,frida/vala,Distrotech/vala,frida/vala,rvu95/vala,Distrotech/vala,severinh/vala,lovebug356/vala,frida/vala,themiwi/vala,themiwi/vala,Jc2k/vala,kamanashisroy/aroop,playya/vala,tjol/vala-tjol,frida/vala,phako/vala,jessevdk/vala,playya/vala,flobrosch/vala-fixes,flobrosch/vala-fixes,severinh/vala,spidermonkdust/vala,tjol/vala-tjol,flobrosch/vala-fixes,frida/vala,kamanashisroy/aroop,jessevdk/vala,tjol/vala-tjol,phako/vala,Jc2k/vala,lovebug356/vala,spidermonkdust/vala,xdave/pvala,jessevdk/vala,spidermonkdust/vala,rvu95/vala,GNOME/vala,GNOME/vala,kamanashisroy/aroop,rvu95/vala,Distrotech/vala,themiwi/vala,playya/vala