Update README.md
Update README.md
Update README.md
Update README.md
added example models

added eight_schools, binormal & normal example models, and modified
launch_SHINYstan_demo function.
update SHINYstan_helpers.R
update server.R
update ui.R
update SHINYstanfit_class.R
update stanfit_to_SHINYstanfit.R
edit SHINYstan_helpers.R
update server.R & ui.R
updated demos
update server, ui, helpers, functions
update helpers

- add color_by_rhat option for param_plot_vertical
- add select parameters by group for param_plot_vertical
- scale_size for bivariate point-style plot
add temporary launch_SHINYstan2 function
update server and ui

-add info, warnings, credits tabs
update server
added .css style files to /www
update helpers, server, ui