Merge pull request #34 from vitalyster/master

Twitter API v.1.1
Merge pull request #35 from vitalyster/master

yet another fix
Twitter backend: increase poll interval to 90 seconds
update twitcurl dependency to latest revision
Fixed compilation with latest twitcurl
Merge branch 'master' of https://github.com/hanzz/libtransport into twitcurl_update