test suite cleanups

[kellyredding]

Cleaned up the test suite and made it as presentable as possible. Conformed style, formatting, and practices.

Assert's tests are lauded as examples and reference material - we can't have them be difficult to read and understand or contain anti-patterns.

@jcredding basically touched every file in the test suite so the diff is rugged. Here is the summary of the changes:

• moved all files into "test/{unit|system|support}" subdirs
• ended each test file with "_tests.rb"
• in each test file
  • renamed all contexts to end in "Tests"
  • reformatted for 80 char width and pruned unnecessary code and empty lines and whitespace

In addition to this reformatting stuff, I had to tweak the assertions a bit. I reordered the methods to be alphabetically ordered and redid the "check_exceptions" stuff. I made it a utility class implementation that removed a lot of conditionals. Those changes should be more obvious in that file's diff.

Look over and double check I didn't screw anything up - thanks man.

[jcredding]

@kellyredding - From what I can tell looks correct :boom: I like the alphabetizing the assertion methods and the check exception logic looks much improved. Very nice.