updated icon for nodegraph category
using utf-8 decoding for tool description and other strings returned frmo database now
using utf-8 decoding for database strings. not quite working yet thuogh because some of the returned strings may not be correct (Paul looking into it)
using urllib2 for internet connection now
updated design of login page
fixed signal processing during login
replacing urllib2 with requests module
removing database py file from git and including the pyc file instead