Fixed two typos, one in README, one in code comment.
New customize option, new frame resizing code.

- Added new boolean option in minimap custom group to dictate if
  minimap-create and minimap-kill will resize the frame it is in...
- Added functionality to minimap-create and minimap-destroy to resize
  current frame if option is set.
Temporarily moved resizing code to minimap-toggle.
Quick code reformat, changed custom option description.
Looked at previous code... WTF, how do I math?
Merge pull request #5 from Archenoth/master

Added option to presist buffer size on minimap toggle and fixed two typos.