Merge pull request #111 from patrickarlt/master

Small fixes
set up mocha/phantomjs for testing
slowly adding more tests
added a DynamicMapLayer spec
added sinon.js for mocks/spies
added a FeatureLayer spec
added a TiledMapLayer spec
added more tests for esri-leaflet spec
updated tests, created a sandbox for sinon to restore all spies/stubs, fixed small type in L.esri.Util.extentToBounds that caused incorrect bounds to be defined.
updated jshint settings, updated a couple of tests to be more clear
setup karma runner
Merge pull request #1 from patrickarlt/odoe

setup karma runner
add coverage plugin
Merge branch 'master' of github.com:odoe/esri-leaflet into odoe
fix spelling add tests to build task
Merge pull request #2 from patrickarlt/odoe

Add coverage plugin
Merge pull request #113 from odoe/master

Mocha bdd tests
merge
work on passing test