Fix Doctrine Adapter (syntax error on PostgreSQL)

"`version`"  is not supported on PostgreSQL.
Merge pull request #49 from okinaka/master

Fix Doctrine Adapter (syntax error on PostgreSQL)
Change branch alias to 1.0
Change branch alias to 1.1
Update example with PDO error handling

Update the example in the Better persistent part to raise the error on SQL error.
Spacing correction
Merge pull request #50 from moiseevigor/master

Update example with PDO error handling
Deleted redundant autoload file
added property to save PDO driver name
initialize PDO driver name in adapter constructor
comment cleanup
aligned '=' signs in variable assignment
retrieved queries from new "queries" property
added comments
added __get method to retrieve new "queries" property
added some newlines to improve readability
added comments
revised "get all tables" query to use new SQL query
Merge branch 'feature/implement-sqlite-database' into develop
Merge branch 'release/tentative-v1.1.0'