Replace DAG generation with ezdag + tangentially related changes

This replaces the custom DAG generation which was difficult to change with ezdag.

In addition, a few other changes that aided in this or noticed during development

• Enforce integer GPS times for analysis (caused issues with file names and was expected to be the case regardless)
• Remove unused condor batch programs
• idq-create-channel-list: make executable

Closes #105 (closed).