interface/gtk2/gtk.cpp : Remove call to deprecated g_thread_init().

According to the documentation the threading stuff is now initailized
inside GTK.
input/cdda/cdda_engine.c : Fix 'path' in cddb_save_to_disk().

Make path a stack allocated array so that sizeof works correctly
and we don't need to allocate and free it.
input/cdda/cdda_engine.c: Cleanups.

* Fix potential buffer overflow in handling of message.
* Replace manual string manipulation with str* functionality.
* Remove un-needed parens from 'return (NULL);'.
scopes2/synaescope/synaescope.c : Fix buffer overflow.
Configuration and build system cleanups.
Rename bootstrap -> autogen.sh.

Also clean up and simplify.
Remove generated file po/Makefile.in.in.
Update .gitignore.