Remove commented NVector require

This require breaks stuff so it's probably out of date and
should be deleted to avoid confusion
Create linux installer script

https://github.com/SciRuby/nmatrix/issues/217
Add Code Climate badge to README
Fix dodgy formatting and whitespace
Linux Intaller: add direct c and c++ paths ~/.bashrc
Remove profile source command

It is not needed
Do not clone nmatrix if already there
stat_spec: Use `let`.
Fixed problem with rspec and rspec-longrun.
Merge branch 'master' of github.com:SciRuby/nmatrix
Merge branch 'remove-instance-variables-stat-spec' of https://github.com/duggiefresh/nmatrix into duggiefresh_255
Merge pull request #236 from agarie/code_climate_badge

Add Code Climate badge to README
Update history for release
Version bump.
Added fix for yale matrix inject behaviour
Uses Bundler's GemHelper regarding `rake install`.
Updated the NMatrix RSpec spec for new constructor
Added homogeneous transformation matrix generation methods (optional)
Forgot these in previous commit
Fixed some API problems related to garbage collection. This restores
compatibility with SciRuby's rb-gsl fork.