Modified letter grade text as Brighten suggested
Merge branch 'master' of https://github.com/Xuefeng-Zhu/SpeedTest into develop

Conflicts:
	app/js/app.js
* region median will be null if first user in the city; in this case, still show chart with other three bars.
do not remove user cache
keep code more consistent
fix performance timeout bug
fix timeout issue for performance
replace test with benchmark.js
comment out the line in benchmark which causing error
grade for too many timeout
increase timeout for database connection
leave more space for chart text
improve some text
Added TODO for fixing another median null bug
disable menu button
Merge branch 'develop' of https://github.com/Xuefeng-Zhu/SpeedTest into develop
move form code before generating report
fix error when region is undefined
timeout data on server
Merge pull request #14 from Xuefeng-Zhu/develop

Develop into master