Patch 1.2.8

• Added computer.beep() method to trigger the audible bell, automatically triggered when a string containing \a is processed by term.write().
• Added missing implementation for os.time(table).
• Added native support for FreeBSD.
• Allow system to catch 'too long without yielding' (thanks ping).
• Rebalanced servers a little, making T1 a little worse but allowing more cards in T2 and T3.
• Screens of the same tier will not connect into a multi-block screen if they are dyed differently.
• Support for actions in OpenIRC (thanks JoshTheEnder).
• Fixed Abstract Bus Card in servers.
• Fixed and standardized os.date() some.
• Fixed files opened in read mode not always being seekable.
• Fixed duplicate listing of file system entries in compound file systems if one is a file and the other a directory.
• Fixed math.random erroring for unit intervals.
• Fixed options not being passed along properly by shell.execute.
• Fixed NPE in robot.use().
• Fixed undirected robot commands leading to unexpected results.
• Fixed robots placing blocks at the wrong place when near water.
• Fixed besh (thanks Wobbo).
• Fixed and improved shell.parse (thanks gamax92).