* Completion using maven search api, TBC
* Parse the whole xml document to get more context info
* Add completion for artifact id
* Add completion for version
* Tune local/central completion providers.
* Add default version range of LATEST
* Distinguish completion items from local/central provider
* Add config to specify the way of viewing maven projects.
* Organize Maven project nodes according to the config.
* Add commands to switch between flat/hierarchical view.
* Add description for commands.
* Make the filename legal in Windows.
* Can refresh tree item.
* Reuse the MavenProject node to avoid extra calculation of effective-pom
* Rename maven.project.refreshAll to maven.explorer.refresh
* Refactor and add Plugins node.
* Make explorer provider static.
* Can list plugin goals.
* Fetch plugins from effective-pom
* Add command to execute plugin goals
* Add icons for plugins
* Renaming.
* Add Chinese localization for package.json
* Add Chinese localization for configuration descriptions.
* Update package.nls.zh.json
* Update package.nls.zh.json