use explict url filter.in case,fille:/// and other unexpected request will not fire events.
introduce polymer
prepare build tools
add grunt vulcanize
add grunt watch
add tabs bind
add switchyd-server.html
add place holder for swithcyd-servers
Merge branch 'master' into polymer
strture files
add paper-dropdown
add server list mockup
fix permission
change permission
add missing style
add slide-from-right
add icon for proxy list
add row insert and delete method
add:server config sync and validation
link ui and data