Add a command in build_version to install a plugin
- Remove the existing plugin
- Install a fresh version
- plugin repository can be choose by the user (by default ../plugin_dbui_build)
- Proposal:
./build_version plugin dbui extjs mathjax
./build_version plugin --release 0.7.3dev dbui
./build_version plugin --git ../plugin_dbui_build extjs
./build_version plugin --tar myfile.tar.gz dbui extjs mathjax