Merge pull request #111 from StDako/master

added matrix.subtraction; update readme to close #91; update src/ files.
#112 Corrected the assert argument order.
[#117] Replaced Make with gulp
Merge pull request #118 from LarryBattle/117_gulp

[#117] Replaced Make with gulp
Merge pull request #119 from StDako/master

update travis, fix tests for random
Corrected the array indention in test files
[#116] Added random.setGenerator() and updated testcase.
Merge pull request #120 from LarryBattle/116_random_testcase

 [#116] Added random.setGenerator() and updated testcase.
Merged with master
Merge pull request #114 from LarryBattle/112_assert_args

#112 Corrected the assert argument order.
fix #121