Add Contributing section
patch for issue #161
- a window does not check for a marker in order to create a window
- added callback to know when a childWindow is created for specs
- updated  grunt versions
- bumped version to 1.0.1
- reverted lodash to underscore due to a bug in
  grunt-template-jasmine-requirejs
Merge branch 'master' into develop

Conflicts:
	dist/angular-google-maps.min.js