Fix item removal & minor additions + fixes
Now we have a combo box option for showing all of the items available
Fix
Minor improvements to item editor
Add an option to show houses
Added Selection Tool

Currently it supports only selecting and deleting selection
Fix up readme
Code style fix
Merge branch 'selection-tool' of https://github.com/Crypton33/forgottenmapeditor

* 'selection-tool' of https://github.com/Crypton33/forgottenmapeditor:
  Added Selection Tool
Update README