doc/modules/luaevent.core.bufferevent.mdwn

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Functions:

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## Read/Write/Error Callback:
* Input: `(bufferevent, what)`
	* `bufferevent` - Reference to the bufferevent that raised the callback
	* `what` - What happened:
		* == `EVBUFFER_READ` - Buffer contains at least low-watermark length and no more than high-watermark length
		* == `EVBUFFER_WRITE` - Buffer ready to write to
		* (other) - Error condition
			* May be or-ed/added with `EVBUFFER_READ`/`EVBUFFER_WRITE` to specify where it happened
			* `EVBUFFER_ERROR` - Marks error condition (need to look at 'errno' for error.. not exposed yet)
			* `EVBUFFER_TIMEOUT` - Marks activity timeout
			* `EVBUFFER_EOF` - Marks disconnection/end-of-file condition

## bufferevent.new
* Input: `(fd, read, write, error)`
	* `fd` - File descriptor to watch
	* `read` - (may be nil) - callback to call when data in buffer is above the low watermark
	* `write` - (may be nil) - callback to call when the output buffer contains less data than the low watermark
	* `error` - callback to call when there is an erroneous condition

## bufferevent (__gc)
* Releases the bufferevent
	* Disconnects event buffers since they were owned by the bufferevent object in 'C' land
	* Disconnects all references so that any erroneous callbacks don't cause failures

## bufferevent:get_read
* Obtains the input buffer associated w/ the bufferevent

## bufferevent:get_write
* Obtains the output buffer associated w/ the bufferevent