Changes on 03-16-13:

• (Probably) fixed the messages that occur when you enter/exit communications range.
• Added the KEEP-ALIVE command for users desiring a finer degree of control over their keep_alives.
• The short-range channel now works from a rover that's going up or down a ramp.
• Fixed a bug where drill bits and antennas didn't perform weight checks and could overfill a rover.
• Fixed a bug where bardenium unit modifiers weren't taken into account when transferring from a storage tower to a rover, resulting in overfilling a rover with bardenium.
• Attempting to TRANSFER while a rover is launching no longer results in a spectacular traceback.