Updates to RStudio console output and bugs for model names in OSX and Linux

There are two minor updates. First, users can now specify model='name' where 'name.tpl' is the model name, regardless of platform. Previously non-Windows users needed to use './name'. This makes the R code platform agnostic.

Second, is that when using RStudio in parallel mode nothing was printed to the console previously. Now, that output is captured and printed after completion of the chains so while it is not live updating, at least the user sees any important output.

Besides these there are some bug fixes and minor additions. Stock synthesis users may see an error when setting mceval=TRUE in previous versions. This is now fixed.