updated Copyright to year 2014
rewritten command-line completion without Glib's g_complete_ functions

 * they have been marked deprecated in recent libglib versions (since v2.26)
 * there is no alternative in recent libglib versions, so we
   simply do it with a little string handling.
   this works with older and newer libglib versions.
updated minimum required Scintilla version to v3.3.7 / Scinterm v1.2

 * allows us to remove most patches. One however is still necessary
   (Scinterm Makefile bug!)
 * TECO-style control code echoing is now set up using the SCI_SETREPRESENTATION message
 * updated copyrights
 * updated TODO