ENH: Add generic get_data_path function.

CPython docs warn that inspect.currentframe "relies on Python stack
frame support in the interpreter, which isn’t guaranteed to exist in all
implementations of Python." However, I tested this in PyPy too and it
works. Yeah!
STY: pep8
TST: Replace get_data_path
quals as arrays
added parse_qual to __init__
left out the import
DOC: typo
DOC: error in README
TST: numpydocstringify
DOC: add module documentation
TST: Add test
STY: blank line
DOC: Improve info of returned string, and added a note about file existence.
Shebang and future import (per @ElBrogrammer's comment)
TST: allow running module
qual now always int
addressing @Jorge-C's comments
Merge pull request #265 from wasade/qual_as_arrays

quals as arrays
Add style for single back ticks

Add custom CSS to change the font of things that are enclosed in single
back-ticks. Currently it uses Courier New, but this can easily be
changed in case someone thinks it should be anything different.
Merge pull request #268 from ElDeveloper/css-mods

Add style for single back ticks