Merge pull request #4 from NatalieP-J/master

XYZ Coordinates
ARO folding, initial implementation
Pulsar ephemerides -- for folding
parallel_record and other files for acquisition/reading
Merge branch 'record'
Add support for .gz files to Effelsberg folding code
Correction of Hour Angle sign in uvwcoords.py
Fold eff correction in opening .gz vs normal files
Merge pull request #5 from mhvk/hour-angle-correction

Hour angle correction
Added Jayanta's code for delay and phase
Merging with upstream