Make the log command available in the para shell

[rackberg]

Currently all shell commands entered in the para shell mode are internally forwarded to the para execute command. If you want to see the log file for a project, you have to leave the para shell mode using the "exit" keyword.

It turns out that this is too complicated to use.

The para shell should allow a new keyword called "log" followed by the name of the project to show the log for. The log command executed in the para shell mode should be executed once and not for every project. Internally the log shell command should be forwarded to the para log command that is currently only available in the operating system shell.