* Add plugin search show plugin version And Update go-sum file

* Update Query plugins method And Add Unit Test

* Update Get data from PluginApi modified to get from UpdateCenter

* Add Unit Testing

* Add unit testing

* remove annotation

* update test

* fix unit test coverage

* fix some questions

* update one result name

* update some questions

* update unit test and fix some question

* fix search plugin question

* remove some comment

* update test method name

* split the method

* update some code

* 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

* 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

* Add post command hook

* Remove commented codes

* Fix the reduandent codes

* 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 show the plugin trend

* Show the trend just as number

* Use star to show the trend