Add event handler for deleting element on grid
Merge branch 'master' into delete-grid-elements

Conflicts:
	app/assets/javascripts/hexgrid.coffee
	app/views/index.scala.html
Identify elements of split clusters
Testing split clusters - WIP
pushing delete feature algorithm - skeleton code + delete WS for positional information
Merge branch 'delete-grid-elements' into delete_cells_alt_approach
removed minor bugs