reinstated lengthened url in the edit urls card
add todos for ensuring network op is off ui thread
Merge pull request #159 from matthewsibigtroth/lengthen_short_urls

reinstated lengthened url in the edit urls card
Fix inspection results discussed in #67  - UrlShortener.java

Changes
-- Remove unused code
-- Fix unchecked call for Android AsyncTask execute() by specifying the generic types
-- Check for NPE
Merge branch 'source-inspection-fixes' of https://github.com/asagrawal/physical-web into source-inspection-fixes