Fix: tx/rx packets counters big values (>2^32)
Update agent.py
Merge pull request #1 from nnugumanov/patch-6

Update agent.py
made NetTxRx.check() a bit better

added detecting for RX-OK and TX-OK positions (sick and tired from hardcoded values) and check that fields are numeric

https://travis-ci.org/nnugumanov/yandex-tank/builds/31090916 - successfully built
Merge pull request #2 from nnugumanov/patch-1

made NetTxRx.check() a bit better
Merge pull request #98 from f2nd/master

Fix: tx/rx packets counters big values (>2^32)