Log Message:
Update onscripter to 20150208.

Upstream changes (no English changelog):

20150208:
 - fix a bug in textgosub insn with "_" clockstr insn strings

20150207:
 - fix a bug that delay insn doesn't read an argument (enbugged in 20150102)
 - implement textcolor insn
 - fix a bug in textgosub insn that doesn't show text when there are multiple
   charactors specified by clickstr insn

20150112:
 - iOS 8 SDK changes