[CB-4915] Incremented plugin version on dev branch.
add ubuntu platform
CB-5128: added repo + issue tag to plugin.xml for battery status plugin
CB-5188:Updated version and RELEASENOTES.md for release 0.2.4
Merge branch 'dev'
CB-5188:
Merge branch 'dev' of https://github.com/apache/cordova-plugin-battery-status.git into dev
wp:battery add RemainingChargePercent
1. Updated platform name amazon->amazon-fireos. Deleted src files.
2. Change to use amazon-fireos as the platform if user agent string contains 'cordova-amazon-fireos'
wp8 add support in level
Merge branch 'dev' of https://github.com/apache/cordova-plugin-battery-status.git into dev
added ubuntu support
Merge branch 'CB-5243' of https://github.com/pu-chen/cordova-plugin-battery-status into dev
Merged WP8 support for level, but #def'd it out so the same code runs on wp7.  Updated docs to reflect WP8 support for battery level, and low+critical events
Merge branch 'dev' of https://github.com/apache/cordova-plugin-battery-status.git into dev