Java client for communicating with a Harmony Hub

Based on the work done to reverse engineer and implement the Harmony Hub protocol in the following projects:

• https://github.com/jterrace/pyharmony
• https://github.com/petele/pyharmony
• https://github.com/hdurdle/harmony

The basics of the API are in place, and there's also a simple shell available through the Main class that demonstrates the API features. The available shell commands are:

• list devices - lists the configured devices and their id's
• list activities - lists the configured activities and their id's
• show activity - shows the current activity
• start <activity> - starts an activity (takes a string or id)
• press <device> <button> - perform a single button press
• get_config - Dumps the full config json, unformatted

1. To build a jar with dependent libraries, run:

   $ gradle assemble

   or

   $ gradle allJar

2. Execute the jar:

   $ java -jar build/libs/harmony-client-all-*.jar HARMONY_HOST LOGITECH_USERNAME LOGITECH_PASSWORD