Added Map-maker skeleton files
added wall back to the map
Implemented map-maker barbarian style
Merge branch 'develop' of https://github.com/soedar/cs3213-project into develop

Conflicts:
	frontend/app/index.html
Clear Map function
add custom map model and relation
Merge branch 'dinda-backend' into develop

* dinda-backend:
  add custom map model and relation
map maker can save maps to db
map maker shows user's saved maps
implmented the try logic with the help of Soedar using modal
fixed merge between trylogic and map-maker
moved the trylogic, run, save, clearall below the visualizer
Some minor fixes
Refactored. No more barbarian style
Removed css for <option> tag
removed a div and inserted br for ui to serparate slider
Merge branch 'develop' of https://github.com/soedar/cs3213-project into gps-workspace
changed color of remove button and removed the border left css
shows default values for the if and while commands
Minor edit.