Adds release notes for upcoming v0.7.0
Merge branch 'master' of github.com:logankoester/grunt-phonegap
Refactors unit tests into a file structure organized by platforms and features
Removes indirect references to Grunt's deprecated external (lodash & async) libraries
Updates dependencies to latest versions
Adds wp8 icon tests (skipped when running suite on non-Windows platform)
Skip wp8 build test file when not running suite on Windows
Adds note to README about platform-based test skipping