Toolshell Example - A command-line shell for Pro Tools

[iluvcapra]

In PR #52 I've added a new example called "toolshell.py", this implements a command-line shell to send a small set of commands to Pro Tools. Here is an example of it in action:

$ python examples/toolshell.py

Toolshell is a demonstration command interpreter that
can remotely operate Pro Tools. Type `help` or `?` to
list commands.

To begin, type `connect`.
    
(not connected) connect
(pt) help

Documented commands (type help <topic>):
========================================
bye  connect  help  locate  newmemloc  newsession  newtracks  play  sinfo

(pt) locate 01:00:10:00
(pt) help newmemloc
Create a new marker memory location: NEWMEMLOC start-time
(pt) newmemloc 01:00:00:00
(pt) play
(pt) play
(pt) help newtracks
Create new audio track: NEWTRACKS count format
(pt) newtracks 2 LCR
(pt) bye
Tooshell quitting...
$

It has a good online help that can list all of the available commands and give details on how to use them.

This example is also uses the new command style Avid is encouraging developers to use, it sends and receives raw JSON to Pro Tools instead of using protobuf to serialize command requests and responses.