Improve error handling/reporting

• Splash screen now shows package initialization

• Classifying log levels
  • debug 10 (cannot be accessed by setting loglevel)
  • log(info) 20
  • warning 30
  • critical 50

• ~800 print statements in VisTrails + 200 commented ones

Conversion issues

core/upgradeworkflow.py

• print "module %s already handled. skipping" % module_id - log or warning?
• debug.critical('Package cannot handle upgrade request. VisTrails will attempt automatic upgrade.') - Should it be critical?

core/analogy/__init__.py

• if _debug: print 'version_a:', version_a (and a lot of similar) - Is it currently being debugged? remove?

core/analogy/eigen.py

• print m_i: remove?

core/bundles/installbundle.py

• A lot of print statements are used for installing deb/rpm packages. I am not sure if I can remove any.

core/bundles/linux_ubuntu_install.py

• Print statements are used for installing deb packages. I am not sure if I can remove any.

core/data_structures/point.py

• Contains print statements but should this low-level library have a dependency on core/debug?