remove old test data
Add test data dir
[pipeline_demo] add initial version of the pl demo

This turns it into a semi-nice CLI tool
[undistortRectifyTimestream] rename pipeline_demo
[undistRectTS] Fix a couple of bugs

- Remove debug prints
- Fix ts.X to self.ts.X
[undistRectTS] Fix further bugs/typos

Misc bugs in porting to proper CLI.
[undistRectTS] Fix bug, & don't fail on bad image
[undistRectTS] Implement start, end & interval

Now, you can process a subset of the timestream using -s, -e and -I CLI
flags
[undistRectTS] Fix interval bug

TS object inverval is in minutes, we need seconds. Needed a *60 in there
somewhere.
Merge pull request #8 from kdmurray91/dev

Add demo pipeline as undistortRectifyTS