Bugfix/fix df

See merge request !11

Spec update

Rebase of the updates to comply with the new spec.

See merge request !9

Testfixes

Fixed some testing issues.

See merge request !10

Conflicts:
	ls/main.go

Feature/ls internal structure

See merge request !7

Feature/df

See merge request !8

Feature/cat

Fixed typo in comment.

See merge request !5

Feature/cat

Initial implementation of cat. So far, this only parses from the command line. I'll add in parsing from input frames once we work out some pipe merging issues.

See merge request !3

Feature/path search

Added the PATH searching algorithm that we talked about at the last meeting with Ciaraldi. We'll need to update ls to follow the same flag standards that we are.

See merge request !4

and search the PATH for that location. If found, it will search all remaining elements for the requested program. If the location
is not found on the PATH, then it will search the entire PATH for the requested program. If found, it returns the absolute path
to the program. If not, err.

Feature/free testing

Moved functions around in common to keep functions related to each type together. Added in some tests for free, since I said we should do that and I hadn't.

See merge request !2

Feature/standards compliant

See merge request !1

Except we aren't using the standard JshFrame struct. We should probably
have a meeting to discuss how we're going to organize that going
forward.

Assumes that it's in bytes. On my system (Arch Linux), values of 0 have
no unit printed next to them.

Conflicts:
	README.md

Provides targets for building, auto-formatting and testing (with and
without coverage).

Based on how the Revel project is organized.

--json mode doesn't have any fancy command line arguments yet. Just
outputs to raw JSON. Seems to work pretty well with Underscore. Also
added some structure; we can work out how the build system will work
later.