Added some utils

For saving a bitmap, and for creating a bitmap from a gesture, with supplied width on the strokes.
*.iml to .gitignore
Gestures are now saved as they are viewed

However, the saving part should be removed from DrawingView, and done when the gesture returns to the StartActivity.
This way we solve multiple problems:
  - How should DrawingView know what to call the image?
  - How would we get the image back to the listadapter, without saving and loading it right after each other?
  - having it in the view makes no sense
  - I'm retarded.
Refactored Paint preferences

Now stored in sharedPreferences, in order to make it available easy for both the View, and for the activity rendering the bitmap.
Removed logs.
"Working"

After the button in NewGestureActivity is clicked, you can click on the list item, choose an activity, and it will be launched. Way too many changes for one commit, because i forgot.
The drawing in DrawingView is improved.