fixed the path to the leaflet image directory
Merge pull request #518 from spenceralger/gruntfile-cleanup

fix the path to the leaflet image directory
Added explicit path to leaflet markers
switched up the build process a bit more, so most of the build occurs in-place, meaning the src and dest options are the same. This allows us to simple copy everthing at once and not need to specify all the edge cases like I did previously in copy:everything_left_in_src
'Add panel' hinting in empty spaces
Merge remote-tracking branch 'spencer/build-tweaks' into buildTweak
Added button to remove panels without using the row editor