Merge pull request #2 from malcolmw/master

Added a command line wrapper, worked on some write functionality
Merge pull request #3 from malcolmw/master

Fix syntax error.
Merge pull request #4 from malcolmw/master

Mainly work on predicted arrival times.
Transcribe 'deltim' field from CSS3.0 into core_tools.Phase objects.
Replace 'qual' attribute with 'deltim' attribute in Phase object class.
Add line to update 'predarr' times in Phase objects.