Added a tab for naming an adventure, fixed bugs with translation.

Added a tab where a name for the new adventure can be given and
saved with a button. Fixed few bugs where translations were not
properly read from json files and thus the text "Text missing"
was shown previously.
Merge branch 'develop' into feature/add_adventure_name

Conflicts:
	Object.py
Comments to previous code and further development of changing adventures name.

Commented my own code, added TODO to scenarioData's changeDirName
and some further lines of code to there aswell
Adventure folder's name changed when adventure name is changed

Also improved naming in editor.py, saveGame changed to
saveNewAdventureName.

Miikka still needs to add proper comments.
Merge pull request #22 from Kauko/feature/add_adventure_name

Feature/add adventure name

The adventure tab has a field where the user can input the adventure's name. When the user presses the Save Changes -button, the adventure's folder's name is changed.

Comments are missing, they must come in a later commit.

Also, the adventure name should be put into the window title, right now it's not visible anywhere.