added PluginEngine.load_plugins
moved move_file function to utils
(fix #7)(fix #5) GUI works, Requires and Scriplets order changed, some fields of Import' page validates.

GUI works and some other staff

Test folder removed

Some text changes

Final text changed

files names changed

Unneecessary files deleted

final changes before first pull request

Button on BuildPage now works fine

Space on end of file removed

Imports fixed
added test project
implemented find_patch plugin (fix #22) + changed project structure
Dialog classes moved into one file - dialogs.py

    Other changes:
- Previous files with dialog classes deleted
- Dialog classes now in the dialogs.py
- Little bit resized wizard window
- Added some comments to wizard class
- Bug fixed that Dialog and FileDialog objects wasn't creating (added imports)
- Instead of button "Next" on last page now there is "Finish" button
- Remade "Changelog" dialog - looks more user-friendly
- Added subtitles to wizard's pages
- Deleted unnecessary attributes on pages (labels)
package_builder.py: fixed function calls
Albert didn't fixed method name calls
moved dialogs.py to new structure
fixed errors in __init__.py catched by pyflakes
implemented plugin engine (fix #11)
added forgotten file from commit aaa40ff
removed class Predictor
changed doc of plugin_engine according to new plugin API
added loading of plugins
added more plugin declaration files
project_builder.py: implemented basic functionality for building projects
dialogs.py, wizard.py PEP8 errors fixed
implemented source_loader (fix #3)
implemented spec (fix #4)