Add top page

Add top page.
Enable to change tags on the top page.
Show file size.
Add a page for search
Refactor structure
Refactor
Add absolute_import
Refactor template files
Enable to search by keyword, filetype, filename, and tagname
Enable to sort lists by type, filename, uploaded date
Export tools to ngsv-tools.git

Export tools to ngsv-tools.git.
Refactor directory structure.
Pretty format download file size (e.g. '1,800,000' -> '1.8MB')
Fix readme
Fix a bug in run.py by adding '#!/usr/bin/env python'
Fix a bug about celery and absolute_import
Modify to use callback class for updating progress of tasks
Merge remote-tracking branch 'origin/master' into lab

Conflicts:
	console/app.py
	console/templates/download.html
	console/templates/upload.html
	console/templates/viewer.html
	db/ngsv.sql
	tools/ngsvtools/data/ngsv.sql
	tools/scripts/ngsv
	tools/setup.py