return nb bytes read instead of the error code when data was read. credits @dezi. issue #181
[hts] tvheadend uses it's own byte order. don't use ntohl. credits @dezi. issue #181
don't return early when poll failed, but do another read. issue #181
[hts] if we read less than 4 bytes in the initial packet size read, don't discard it but wait for the rest to come in within iDatapacketTimeout. issue #181
[hts] bump add-on version
Merge pull request #209 from opdenkamp/hts-read-timeout

revisited PR #181