add build script
use custom bootstrap for smaller executable
  * remove unecessary fonts
  * remove bootstrap.js and jquery
build: add version to zip
frontend: version from bootstrap dir removed
  * better for updating
build: bindata filter
frontend: hide snapshots when on selection
  * snapshot list can be very long
  * now the snapshot list get be hidden on selection
  * no more scrolling to content necesarry - remove auto-scrolling
frontend: rename angular folder
  * no version in folder
  * there is a version.txt to check the version
update README
frontend: show response errors on frontend
backend: empty slice should be '[]' not 'null' in json
  * change slice initialiations to prevent nil slices
backend: ZSD_SERVE_FROM_WEBAPPS -> ZSD_SERVE_FROM_WEBAPP
frontend: show snapshots even its empty
  * empty snapshot table -> no snapshots found
frontend: show spinner when loading in process
update CHANGELOG
Merge branch 'develop'