Resolves #658 - Regression test for SP platform variance
Update comment on test for exact SP output, per pull request feedback.
remove -stdlib= flag on linux

which was causing problems:
unrecognized command line option -stdlib=libstdc++

and add -std=c++11 (C++11 standard) to align with OSX flags
Merge pull request #668 from breznak/cmake_linux_fix

remove -stdlib= flag on linux (fixes Issue #669)
Merge pull request #660 from iandanforth/nupic658

Resolves #658 - Regression test for SP platform variance
Merge branch 'master' of github.com:numenta/nupic