Merge tag '1.5.4' into develop

v1.5.4

- Fix: HttpLib now combines chunks for request/reply operations
adds a function which compares a string againsts a set of possible values
Merge pull request #8 from zcourts/develop

compare string against a set of possible values
Fix: Use http_build_query to ensure that recursive POST bodies are encoded
Merge pull request #9 from datasift/feature/recursive-encode-body

Fix: Use http_build_query to ensure that recursive POST bodies are encod...
Merge branch 'release/1.5.5'