Make position="identity" the default: it is the correct option and supresses a
warning message.
Add the possibility to specify the number of bins in ggs_histogram().

  - Supresses messages.

  - Allows for a fine grained control of the histogram, based on the number of
  final bins.

  - Solves issue #12
Merge branch 'includeCoda' of https://github.com/jucor/ggmcmc into jucor-includeCoda

Conflicts:
	R/help.R
Merge branch 'here' of https://github.com/jucor/ggmcmc into jucor-nlags
It fixes a warning from ggs_autocorrelation() and rewrites some old code that a new version of plyr has turned easier.
Merge branch 'crosscorrelation' of https://github.com/jucor/ggmcmc into jucor-crosscorrelation
Thanks to jucor. Solves issue with crosscorrelation and number of dimensions.
Code arrangement.
Merge pull request #20 from jucor/convertFromStan

Fix: issue #18 simple STAN test case
added separation plot and roc plot
Minimal code arrangement.
Add a note to the documentation on why coda:mcmc is preferred over rstan::extract.
Solve bug in ggmcmc when plotting ggs_crosscorrelation() and there is only one parameter.
Solves bug introduced in commit #4e76705a when substituting cast() by dcast() in order to use reshape2.
Allow NULL as filename for the pdf file in ggmcmc. This returns control of the pdf device (or any other device) to the user. Solves issue #25.
Add "suppressWarnings()" to any ddply() call that uses .parallel, in order to
avoid warnings if the user hasn't changed the default parellel=TRUE to
parallel=FALSE.
Merge branch 'ppd' of https://github.com/zmjones/ggmcmc into zmjones-ppd
Separation and ROC plots by zmjones.
Improve code documentation.
Add the possibility to subset by family directly in the ggs() call.
Make the "burning" argument work in ggs().
Minimal arrangement to try to make the ggs_partial() and ggs_rocplot() functions.
Merge branch 'zmjones-ppd'
Add zmjones contributions.