po/POTFILES.skip: Don't translate the generated .c file.
.gitignore: Use wildcards for .c, .o and .stamp files.
Makefile.am: Move the binary to the src dir, add the icon, and a hook
for generating the ChangeLog.
data/quick-photo-editor.ui: Add tooltips, and fix a couple of labels.
po/POTFILES: Update list of files.
po: Remove generated files.
po/es.po: Translate the new strings.
po/quick-photo-editor.pot: Let it be autogenerated.
src/quick-photo-editor.vala: Translate the other string in the
program, and call bindtextdomain.
vapi/config.vapi: Clean up.