Added missing txpl parameter to prmData()

This useful parameter is currently not loaded into myBeam.prm from the dfile
Create fetchUtils.py

new routine to fetch remote and local routines, uncompress files
Minor documentation changes. Generalizing remote fetching routine for general remotedirfmt and fnamefmt.
Minor changes. Also removed the part of the code that determines the start time of the first file in the list of downloaded files.
Changed cycle_inc to more intuitive time_inc in fetch_remote_files.
Changed tempdir to outdir.
Working on fixing up the fetch_local_files method.
Cleaning up the code and documentation.
Optimized both the local and remote fetching routines.
Merge pull request #41 from vtsuperdarn/feature_FetchUtils

Merge feature_FetchUtils branch into develop
Merge pull request #43 from asreimer/patch-11

Added missing txpl parameter to prmData()
Merge remote-tracking branch 'upstream/master' into develop

Pulling in hot fixes from master branch into develop that cropped up in
the branch transition.
Merge remote-tracking branch 'upstream/master' into develop

Another hotfix merge
 Make it possible to save the .radar.sqlite file into the DAVIT_TMPDIR

Use the DAVIT_TMPDIR environment variable if defined.
If it is not use the defined HOME directory.

When HOME directories are a network mount, its preferable to stash
reusable davitpy files on a local filesystem for faster access.

 Changes to be committed:
	modified:   pydarn/radar/__init__.py
	modified:   pydarn/radar/radInfoIo.py
	modified:   pydarn/radar/radStruct.py
Merge pull request #48 from jspaleta/Feature_Pydarn_Radar_tmpdir

 Make it possible to save the .radar.sqlite file into the DAVIT_TMPDIR
Created coordUtils.py for coordinate conversion.
Minor doc change.