Fix to properly escape JSON with single quotes

This issue was introduced with the commit
e915bb3876e523c302f8c769c46a7b502b737a89
Removed linux dependence on libRcpp.so
In Rcpp 0.11 it is no longer necessary to link against this, in fact you can't.
Crosstabs: Added a 'counts' option
Updates to documentation

* Newer R bundles
* Added linux R bundle
* Added rebasing your repo guide
Updates to the git guide
Deleted unused files
Updates to TTests, table renderer, etc.
B One Sample TTest - Tweak to form
Merge pull request #69 from mmarsman1/development

Fixes to Bayesian ANCOVA and Classical Linear Regression