Merge pull request #53 from joeyzhang1989/master

implement javadoc and adjust existing javadoc
GridView Bug Fixed

GridView Bug Fixed
Merge branch 'master' of https://github.com/zhaozheid/CCD_SOEN6441_TD

Conflicts:
	src/com/soen6441/ui/common/GridView.java
	src/com/soen6441/ui/map/MapItemCell.java
Confliction Fixed

Confliction Fixed
Merge pull request #2 from zhaozheid/master

update