[SoapClient] Added proxy authentication option in SoapClientBuilder

Fixed #47

[SoapClient] Added proxy authentication option in SoapClientBuilder

Fixed #47

Merge branch 'fixed_tests'

Update Curl class to support CURLOPT_CAINFO and CURLOPT_CAPATH options

Cleaned unused method, property, variable or parameter

Cleaned unused method, property, variable or parameter

Merge branch '0.1'

Fixed ambiguous namespaces usage