proxy a batch of request to remote
using builder to keep config for proxy immutable
worked on batch proxy for standalone
added validation for batch proxy
added failover to batch proxy api
failover api for batch proxy
added batch proxy api to server
applied config to batch proxy
added batch proxy with failover to server
added proxy json api
added failover to server batch proxy json api
it's not allowed to have URL in proxy from server
upgraded http client to 4.3.2
upgraded guava to 16.0
used wrap rather than new class to provide a char source
added argument check for proxy
used awaitility to wait server shutdown completely as an temporary solution from #51
added variable to template in api
upgraded netty to 4.0.15
provided runner as published interface