CB-5188:
1. Added amazon-fireos platform.
2. Change to use amazon-fireos as the platform if the user agent string contains 'cordova-amazon-fireos'
add ubuntu platform
added ubuntu support
[CB-5565] Updated version and RELEASENOTES.md for release 0.2.4
[CB-5565] Incremented plugin version on dev branch.
CB-5658 Delete stale snapshot of plugin docs
CB-5658 Add doc.index.md for Device Motion plugin
CB-5658 Update license comment formatting of doc/index.md
CB-5719 Updated version and RELEASENOTES.md for release 0.2.5