Added support to directly connect also to Microsoft SQL Server database.

Fixed direct connection to always use the same query as of UNION query SQL injection (= one query with multiple columns/entries output).
Minor fixes to Firebird/Access/SQLite connectors to use connector's execute()/fetchall() as wrapper for third-party libraries' methods.
Forced conf.timeout to 10 seconds when directly connecting to database.
Slightly improved regular expression to parse -d parameter.
Added import check for all connectors' third-party libraries.
Code refactoring:
* Moved conf.direct request to direct() function in lib/request/direct.py (code reused where needed).
* Back-delegated to generic connector close() and other methods.

lib/controller/action.py

@@ -65,9 +65,6 @@ def action():
 
         raise sqlmapUnsupportedDBMSException, errMsg
 
-    if conf.direct:
-        conf.dbmsConnector.connect()
-
     print "%s\n" % conf.dbmsHandler.getFingerprint()
 
     # Techniques options