install.URL Return TRUE/FLASE on whether the installation worked or not.

added a "wait" parameter with default as F (it now means that R doesn't wait for the installation of the software to finish before it releases the console).  And also "..." with access to the shell command run.
updateR - now checks if R was installed or not (Based on the output of install.R), and removed the need to ask the user that.

Also added setInternet2(TRUE) for when updating packages (to help it work with specification of proxies, etc.). (this seems to be safe for regular users - but I hope it won't cause new problems.)
Bump to version 0.8.3