Support arguments in pelix.shell.console

[tcalmant]

pelix.shell.console is the script executed by most of Pelix/iPOPO users to quickly test their bundles/
Therefore it should accept some arguments to ease those tests.

Here are some ideas:

• --version: prints the version of Pelix and its installation folder, then quits returning 0;
• --init <script>: runs the given script file (in fact, calls run <file>) before accepting shell input;
• --run <script>: runs the given script file then exits;