Sagot IO Channel API

[scott]

Create and implement IOChannel API for Sagot

• Must allow reading for raw file descriptors
• Include FileChannel? implementation as a subclass of IOChannel

[scott]

(In [23]) Migrated to Dapper & Completed FileChannel Object

• Upgraded my home workstation to dapper, so I had to change configure.in.
• Added iochannel and filechannel implementations:
  • sagot_glib_filechannel.c
  • sagot_glib_filechannel.h
  • sagot_glib_iochannel.c
  • sagot_glib_iochannel.h
• Ensured that sagot loads channel implementations

This commit closes #44 & #45

[scott]

(In [24]) IOChannel Integration

• Made first steps toward integrating IOChannel with the event framework
• Added constants to IOChannel for watch types
  • IOChannel.READ for read-ready events
  • IOChannel.WRITE for write-ready events
  • IOChannel.READ_PRIORITY for read-now (buffer full type) high proprity events
  • IOChannel.ERROR for read/write error events
  • IOChannel.HANGUP for sig-hup and disconnect events
  • IOChannel.INVALID for other error types (closed filehandle, etc)
• Added close method to IOChannel objects
• Added watch method (currently non-functional)
• Fixed error handling
  • undefined references to sagot_iochannel_error
  • sagot_iochannel_error and GError object dereferencing problems
• Fixed read, readline, getc methods
  • Problem with return value assignments
  • Buffer lengths were using JSVAL_TO_DOUBLE which gives us poor behavior

Still lots of warnings at compile time

refs #45, #46