AssertionLib 2.0.0

• Added new AssertionManager() methods based on the builtin math module.
• Swapped the allclose() function with math.isclose().
  Note that one of its keyword arguments has now changed names from rtol to rel_tol.
• Added tests for OSX.

AssertionLib 1.1.1

• Added the new AssertionManager.function_eq() method for testing the equivalency of functions.
• Fixed an issue where AssertionManager.function_eq() would raise an AttributeError if
  the two functions __code__ attributes were not equal in length.

AssertionLib 1.0.0

First release.