Remove all spaces/format chars from data files

[danieldjewell]

The use of spaces and/or other punctuation in filenames has been
problematic for years. Even though modern OSes (usually) handle it
somewhat OK, that can't be assumed. Older OSes (especially big *NIXes)
could be especially problematic.

This renames all data files in the thermo/ directory to use underscores
instead of spaces, removes (), and changes "-" to a single underscore.
References to the files are also updated.

I ran the test suite and the results are the same pre/post. (Some of the
tests failed on a clean copy of master -- is the test suite 100%?)

[coveralls]

Coverage remained the same at 88.852% when pulling b49d3aa on danieldjewell:death_to_0x20 into 9f4175a on CalebBell:master.

[CalebBell]

Hi Daniel,

Escape characters for spaces have been supported on every popular OS for longer than I have been alive; tab-completion on pretty much any shell will add them for you. You could equally say unicode characters are an issue in the Python files themselves, to which I would say, upgrade your Python/OS.

I appreciate that you want to improve thermo, but it looks like work for no benefit to me. Is there a particular issue you are having I am unaware of?

Sincerely,
Caleb