added rstudio project files
added to ignore httr oauth file
various fixes, closes #15
added fxn to check if swap already set, and if so, skip
added new param mirror to let user set cran mirror, and fxn to check if an acceptable mirror
set default user and pswd for rsutidio server so works out of gate
doing remove ssh-keygen only within the scp_ssh fxn, seems to work better
added installation of shiny and rmarkdown pkgs to shiny install script
and fixed shiny install, works now