Add realm support to OAuth 1.0 Service

add remove function to ParameterList
add realm to OAuth 1.0 configuration
modify Service::generateOAuthParameters, so it adds realm, if set
modify Service::signRequest to ignore realm parameter
Add OAuth 1.0 Service test, that sends request with realm set
Merge pull request #57 from swat32exe/add-oauth-1-realm-parameter-support

Add realm support to OAuth 1.0 Service