Add job params to configure scm trigger
Add ability to configure post build artifact archiver step
Fix comments to match method signature for JenkinsApi::Client::Job#artifact_archiver
Merge pull request #157 from hubert/feature/scm-triggers

Add job params to configure scm trigger
Merge branch 'post-build-artifact-archiver' of https://github.com/hubert/jenkins_api_client

Conflicts:
	spec/unit_tests/job_spec.rb
Bump version to 1.2.0.
Updated CHANGELOG for v1.2.0.