* lib/screenshooter-utils.{c,h}: add the "screenshooter_" prefix before

    (take_screenshot) and (save_screenshot).
  * src/main.c: use the new function names in (main).
  * panel-plugin/screenshooter-plugin.c:
    - use new function names.
    - add a missing prototype.
    - clean the indentation of prototypes.
    - add a "cb_" before all callback functions names.
    - use a "screenshooter_plugin_" prefix for other functions.


(Old svn revision: 5848)