Fix imports and add __all__ for download_file_list

Fix package init to not import py.test

Fix remote tests, add local

Fixes to local tests

fix typos

Integrate comet endpoint

* adding observations get_metatdata function

* minor tweak to example

* fixing tic case sensitivity bug

* stylistic improvements to mast docs

* refactoring based on feedback, adding docs and tests

* doc string fix

# This is the 1st commit message:

add HiGal module

more cleanup

add changelog

it is possible for a cutout to be missing; we need to allow for that.
Also, the hack I had before isn't needed when you appropriately query
for multiple wavelengths

remove some comments, still not done with the PR

minor correction

added basic docs

pep8 fixes.  The bracket closures DO match the indentation, though.
pep8 lies sometimes.

add local tests and cleanup some testing

more interactive tests revealed that my hacks didn't really work, this
commit has some fixes

move everything into astroquery.herschel.higal

update relative paths

whitespace

# This is the commit message #2:

update tests

# This is the commit message #3:

the higal server genuinely isn't showing anything when I search online now

# This is the commit message #4:

add HiGal module

# This is the commit message #5:

more cleanup

# This is the commit message #6:

add changelog

# This is the commit message #7:

it is possible for a cutout to be missing; we need to allow for that.
Also, the hack I had before isn't needed when you appropriately query
for multiple wavelengths

# This is the commit message #8:

remove some comments, still not done with the PR

# This is the commit message #9:

minor correction

# This is the commit message #10:

added basic docs

# This is the commit message #11:

pep8 fixes.  The bracket closures DO match the indentation, though.
pep8 lies sometimes.

# This is the commit message #12:

add local tests and cleanup some testing

# This is the commit message #13:

more interactive tests revealed that my hacks didn't really work, this
commit has some fixes