Previously, only the lib named "power" was used (and therefore power parts defined in other libs not shown).
Now, all power parts can be loaded from any library.
Also, when loading power parts from the chose component dialog or the lib viewer, libs and parts are filtered: only power parts and libs containing power parts are listed.
Hotkeys: move a few global strings in the files where ther are actually used (and make them local.) and code cleaning.
Fix a few other minor issues.
* Add more missing source code licenses.
* Fix coding policy violations (tabs and trailing white space) in Python
scripting code.
* Add stable release policy to full documentation build.
jean-pierre charras
Wayne Stambaugh
Miguel Angel Ajo