Update README.md

fixed live demo link
Merge pull request #84 from greggythefly/master

Fixing userAgent in the default.yaml
Merge pull request #83 from brikou/patch-1

Update README.md
Support port overriding via process.env.PORT

Refs #37
Stop the server if MongoDB is not started
Terminate simple statements with semicolons. Remove semicolons from compound statements.
Changed some implicit global variables to local variables.
Fix semicolons in bootstrap.js file.
Make monitor and analyzer module-local instead of implicitly global.
Make Poller p local instead of implicitly global.
Merge pull request #85 from coderunr/linted-patch

Some general code clean-ups
Use Url as Check name when left empty

Closes #88
adding alert threshold
adding alert threshold
adding alert threshold
adding alert threshold
Refactor alert treshold model code
Merge pull request #91 from fzaninotto/alert-threshold-for-checkevents

Alert threshold for checkevents