[feature] Add support for column alias

Suggested by @jimolina on issue #45
add Multiplication and Division to update function
Merge branch 'wutong-master' into develop
[fix] Add quote for update column
[fix] Fix MSSQL & Sybase connection
[fix] Fix #65 BIG BUG for MSSQL quoting
[fix] Improve connection code
[fix] Add $queryString as variable
[fix] Fix support for double value
[feature] Add MariaDB for connection
[fix] Quoting bug for update
[fix] Fix MariaDB connection
[update] Update composer.json configuration
[update] Update license
[fix] Remove empty tab
[hotfix] Medoo 0.9.1.1 - Fix #68 MySQL SQL_MODE
Merge branch 'develop'

Conflicts:
	medoo.php