Added new Samsung, Pretigio and Allview tablets.

Code refactoring started by @nicktacular

Issues fixed, added new project based on the library.
Added contribute workflow section.

PHPUnit tests are now in /tests/ folder.

Tests for version() and mobileGrade() are now functional.
Updated README with new projects, text and layout. Better 'how to contribute' explanation.
New tablets added, and multiple fixes suggested by users. Fixed the version() and mobileGrade() implementation code.

New tablets, requests from users, typos.

Corrected regex for Windows devices, various fixes, new Sony tablets.

New Samsung, Toshiba, Prestigio, Danew, Texet, Galapad and generic ta…

…blets. Fixed Opera Webkit detection. Started to merge the version() keywords together, preparing for 3.0. Various bugs closed. New tests, all tests pass.

New Samsung tablets, corrected automated tests, various issues closed.

Merge branch 'devel'

Conflicts:
	Mobile_Detect.php

Added new Blackberry 10 support and couple of UAs for tests.