Initial commit of the Invocation object.
Initial commit of the Invocation object.

domenkozar/jenkinsapi,zaro0508/jenkinsapi,JohnLZeller/jenkinsapi,domenkozar/jenkinsapi,aerickson/jenkinsapi,salimfadhley/jenkinsapi,imsardine/jenkinsapi,imsardine/jenkinsapi,zaro0508/jenkinsapi,zaro0508/jenkinsapi,aerickson/jenkinsapi,jduan/jenkinsapi,JohnLZeller/jenkinsapi,jduan/jenkinsapi,mistermocha/jenkinsapi,imsardine/jenkinsapi,mistermocha/jenkinsapi,salimfadhley/jenkinsapi,mistermocha/jenkinsapi,JohnLZeller/jenkinsapi