Merge pull request #1 from etjones/master

Added test_costFunctionReg to ex2 tests
Added better instructions, so unit tests can be kept in a different
directory from the class code.

I was copying the files from one repo (private) to another (public) and
this wasn't efficient at all! These instructions are better for
collaboration.
Added "minimal" test case for costFunctionReg

- These tests use only 0s and 1s for the matrices, mainly, and allow you
  to find if you've got the very basics of the algorithm working. For a
  more detailed test of costFunctionReg see test_costFunctionReg.m from
  community TA Collin Beckingham which uses magic(3) and non-trival values
  for theta and y
Added note about column vectors
formatting readme
Readme formatting
Added note about and link to Honor Code
Merge remote-tracking branch 'upstream/master'