First commit for Weever Signature.
Merge branch 'foundation-5-migration' of github.com:WeeverApps/weever-plugin-common into foundation-5-migration

Conflicts:
	js/views/subtab.formbuilder.edit.js
Merge branch 'foundation-5-migration' of github.com:WeeverApps/weever-plugin-common into foundation-5-migration
Merge branch 'foundation-5-migration' of github.com:WeeverApps/weever-plugin-common into foundation-5-migration

Conflicts:
	js/views/subtab.formbuilder.edit.js