Add single name as a output format

Add bash completion for jcli

Contributing guidelines: REST API information links and spelling fixes

Add sonar code coverage report paths config item

Add contribution guide

Set the exit code for golint

Add code covrage badege for sonar scan result

* Add go vet and golint

* Fix all problems found by golint

* Install golint in traivs

* Fix the test fail

* Add test cases for job create

* Add test cases for edit user desc

* Add test cases for user delete

Set pull request merge restriction

* Add more shield badages

* Add gitter room as a shield badge

* Add support to upgrade a plugin by command

* Try to fix the travis pr id

* Add test cases for plugin upgrade command

* Add more test cases

* Add user-agent into http request

* Add test cases

* Add setup test go file

* Add support to cancel a job from the queue

* Just let the 404 go

* Add a test case for queue cancel command

* Add more test cases

* Add test cases for queue command

* Change the job edit api url

* Update go.sum file

* Add test cases for getting and updating pipeline job

Try to fix the travis pr id

Add support to search all jobs

Add support to finish the watch by conditions

Fix the wrong of watching center status

* Add post command hook

* Remove commented codes

* Fix the reduandent codes

Fix the issue that cannot uninstall pluing

* Add support to output installed plugins as json format

* Fix the wrong filter of plugin list

* Adjust the test data

* Adjust the test data

* Add test cases for getCrumb

* Add branch name

* Add branch name

* Add branch name

* Add test cases for job client

* Add more tests

* Refactor delete job function

* Add test for job type cmd

* Add test for job stop cmd

* Add test for job search cmd

* Add test for job delete cmd

* Add test case for plugin manager client

* Add test cases for plugin search cmd

* Add support to download Jenkins

* Add test cases for http downloader

* Exclued mock files

* Exclued mock files

* Add test cases for center download

* Remove mock files

* Fix gen-mock

* Add init stage for building

* Add test case for jenkins upgrade cmd

* Add test casee for center watch cmd

* Add test case for center cmd

* Add support to define a suite of plugins

* Add test for findSuiteByName

Add more testcases

Add support to upgrade Jenkins