started working on ctr z feature
Merge branch 'master' into undo

Conflicts:
	tile_item_functs.h

merged changes so that i could continue working
got undo feature working, still has some bugs though.
added function to remove portals.
fixed a few bugs with the ctr z feature
- bugs with the undo feature; + icons for error messages; +ideas to "feature to add.txt";

Signed-off-by: jensenr30 <jensenr30@gmail.com>
redid that way that the history was stored
Merge branch 'undo'

Conflicts:
	tile_item_functs.h