Added getSource function.  Just prints to console for now.
getSource function modifies 'Sources' box at bottom of page and its link
hiding bad variables
Merge branch 'gh-pages' of https://github.com/nickmcclellan/dcaction into gh-pages

Conflicts:
	js/visualization.js
attempting to fix issues from the recent merge
trying to fix the CSS
optimizing layout, adding school layer data, fixes #52
Committing a few CSS changes to make the map responsive. Closes #15
Merging from master gh-pages
Modified visualization.js to provide sources
Fixed bug where source was still showing after 'clear selection' was clicked
Merge pull request #74 from charlesdguthrie/gh-pages

#27 Source legend (lower-left) now shows name and link to source
updating data with grad rates
Hiding legend until a layer is selected
Adding violent crimes data, fixes #71
Adding click name to remove to point-layer
attempting to perfect legend hiding
updating crimes data, adding per capita layers, fixes #71
Updating per capita, readding counts
Updating crime layers with correct data