Http: used properties instead of class variables

Browse: updated the file to go with the Http protocol updates
Merge branch 'python' of https://github.com/LemmaLtd/Narith into python
Refactor: Replaced Protocol presence functions with Packet's hasProt
FtpSession.py:starting imp tcp sesssion
FtpSession.py:starting imp tcp sesssion
Classifier: Removed empty protocol intialization

Tcp: uncommented http

TcpSession: fixed one packet session bug
TcpSession: fixed Type error bug
FtpSession.py: Fully dependent on TcpSession
TcpSession.py: Out and Incoming traffic classified by src,dst pair
Minimal fixes
HttpSession: extracting data from http sessions
FtpSession.py:extract data from sessions
Merge branch 'python'