Implemented brush resizing

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>
Show document modification status in frame title
Fix a nasty bug when merging selection results

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>
Map writing and autosave.

Signed-off-by: Kristian Duske <kristian.duske@gmail.com>