AliRelVal: fixed broken if clause and var name
AliRelVal: supports platform alongside arch

Two different fields for platform and arch. Example:

 - platform: Linux
 - arch: x86_64-2.6-gnu-4.1.2
AliRelVal: preparing templated strings
AliRelVal: adding modulefile
AliRelVal: recursively make dirs for pack and mod
AliRelVal: exceptions to logging facility
AliRelVal: configurable unpack cmd, clean on error

Note: unpack DESTDIR is the AliRoot version's top dir, and it does not
contain in turn another <VERSION> dir inside.
AliRelVal: improved unhandled exception logging

It now specifies the traceback order
AliRelVal: validation packages from the right list
AliRelVal: start oldest validation only

Rationale: start only one validation per run
AliRelVal: TimeStamp can customly format dates
AliRelVal: fixed reversed logic in Validation
AliRelVal: session tags based on the inserted date
AliRelVal: update validation entries
AliRelVal: starting release validations
AliRelVal: support for "fetched" and id in package
AliRelVal: update cached package status method
AliRelVal: use db to store download status
Merge branch 'feature-alirelval-startqueued' into feature-alirelval