[Docs] Small updates to README.md

Expanded Supported Devices section, made a few formatting changes,
wrapped all lines at 72 characters.
[Docs] Added building instructions for BlackBerry 10
[Docs] Improved Markdown formatting, wrapped text at 72 characters
[Docs] Moved copyright to README.md and put full GPL License to COPYING
[Docs] Updated copyright boilerplate in .cpp and .h files
[Docs] Added copyright boilerplate to all .qml files