Clean up lib directory

All NOC's code must be moved out of lib/ directory cause it may be polluted by virtualenv

Modules to be refactored:

• app
• clipsenv.py
• convert.py
• database_storage.py
• datasource.py
• dateutils.py
• db.py
• escape.py
• forms.py
• geo.py
• highlight.py
• middleware.py
• nosql.py
• periodic.py
• prettyjson.py
• pyquote.py
• registry.py
• rpsl.py
• scheduler
• stencil.py
• sysutils.py
• template.py
• tests
• text.py
• timepattern.py
• tt.py
• url.py
• utils.py
• validators.py
• version.py
• widgets.py

Other

• .gitignore lib/