Add the possibility to extend at run time the PYTHON_PATH
(i.e. module search path)

-- Configuration is now stored in a text file instead than into
a python class

-- Check the validity of helper files coming from a previously running script

Some more try&except statements handling the database

Use functions of the os omodule to handle/strip/join directories
and files, instead of 'home-made' expressions

Support the disabling of DB access

Do not update the DB configuration, since it is not useful

-- Dynamic loading of the filename parser module added

Modified Files:
	CastorScript.py

Typo corrected

Modified Files:
	CastorScript.py Database.py ManagerThread.py

-- Exception reporting in DB corrected
-- Filename pattern matching

----------------------------------------------------------------------
Modified Files:
	CastorScript.py Database.py

-- The logger for the database is created in the main. In this the same\
file is reused for different database instances

----------------------------------------------------------------------

The db connection is refreshed with a configurable timeout

* Database logging severity level can now be change run time

Connection string and table names are now configurable

-- Per thread logging
-- Avoid clashes accessing the DB using locks
-- Use statvfs instead of df

Enable dynamic directory definition.
Merge some changes made during testing

Directory for sources created