use the root project to detect the custom support-v4
compute the Content-Length for multipart uploads as chunked encoding is not supporting by all servers
Merge branch 'request_builder' into ion

Conflicts:
	HttpClient/src/com/levelup/http/HttpBodyMultiPart.java
better handling of the streaming timeout
add a test for the stream timeout
Merge branch 'request_builder' into ion
make Android Studio happy
renaming
fix the multipart InputStream upload
stronger streaming tests
Merge branch 'request_builder' into ion
fix the blocking InputStream with proper timeout