Created errors module.

Created directory and Python init file for the errors module.
Implemented Patterns calss in LineMatching.py.

Added a bunch of regular expressions that are used to classify lines
from the Valgrind log.
Added example Valgrind output file.

To be used by the tests.
Added test for LineMatching.Patterns.

Reads valgrind.errors and counts the number of times each patten finds a
matching line. Expected values are hard coded.
Added a C++ application in which Valgrind will find a bunch of errors.

Running Valgrind on this application produces the valgrind.errors file
used by the tests.