text change

Changes
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- Session limit 
 - message for sessions of more than 2 hours
 - session timeout in docs
- block some spam domains
- change local setup button is not coming in dashboard when using command line app
- local testing changes
- search, changes to show session name in sidebar
- UI for deleting sessions and builds

Fixes
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- **cleanup rake task**
- **Analytics of extensions**
- FAQ 504, broken link for "team"
- not able to see all local URL's for which command line tunnel is created 
- change 'Atleast' to 'At Least' on sign-up errors
- invoices, pdf quality improved

**Important Note:** 
- Migrations are required
- Some Gems will be updated
- Changes must be done in monit.rc and rake tasks re-started @9ikhan