Updates to the R bundle

- OSX bundle updated to R-3.1.1
- Bundles updated to Rcpp 0.11.3
- Bundles now include qgraph, lme4, etc.
Fix to DataSet loading crash

loading certain data sets would crash JASP
CSV file handling: single space now treated as NA

CSV files written by SPSS have single spaces for missing values
Fixes to t-tests
Bayesian ANOVA: temporary hiding of options

until the appropriate R code is working
Fixes to missing values in NominalText variables
Removed JASP R package imports

they cause some problems on some machines
ANOVA: Fix to text alignment

Fixes #30
ANOVA: Fixed blank table to match final
RM ANOVA: added grey lines to delineate sections
Tweak to DataSet loading into R
ANOVA: Overhaul

Refactor of R code
Tweaks to UI
Fixes #28
Added unbinding to Options

Sometimes inserting a new analysis would rerun an earlier one because
of left over event listeners. Unbinding clears earlier event listeners.
Updates to documentation

Added a guide to JASPPreview
Fixed some spelling errors
Bump version number: 0.5
Updates to R style guide
Potential fix to a crash issue
Fix #39 and #40 anovaBayesian

#39 caused by the inability of enumerateGeneralModels to include
interactions without corresponding main effects. Wrote some workaround
code, and wrote an error message for this

# 40 stupid, replaced errorbot with errormain, the correct one
Fix #44 Bayesian ANOVA

Add that the dependent has to be specified before starts running
erroneously added a document