started 0.2dev branch
added InfoBoxWidget for Popupinformation
Added several Widgets to clean up code. Rebuild CheckboxWidget to
CheckboxField and moved into field.py.
Started to refactor.

Allready refactored: _edit_ressource_or_event, _add_event and
_add_resource
implemented WINCH eventhandling as preparation for autoscaling winsize
refactored some code, started to make the size of the windows dynamic
More refactoring. Moved all "widgets" in own windowclasses.
Bugfix in pycalcurse.py and setup.py

* bugfix for dynamic winow width
* changed setup_requires to install_requires
modified gitignore
Bugfix: added missing wrapper for addstr function
Fixed unicode bug.

Events and ressources are not allowed to contain äöüß and so on.
2 small Bugfixes.

curses_window.py:
* fixed wrapper function

pycalcurse.py:
* fixed utf-8 errors
Merge branch 'dev'

Conflicts:
	.gitignore
	pycalcurse.py
	versions.txt