Fix for using he same keep-alive connection to perform several requests to the same host. Reset internal flags for each new request.
Merge pull request #15 from k-stolyarov/multi-reqests-fix

Fix for using he same keep-alive connection to perform several requests ...
add AVHTTP_DISABLE_LOGGER_TO_CONSOLE for disable log output to consloe.

Signed-off-by: jack <jack.wgm@gmail.com>
add AVHTTP_ENABLE_LOGGER for output log.

Signed-off-by: jack <jack.wgm@gmail.com>
Update .travis.yml