Active state for 'share-on-twitter' button, on desktop.
Bumped appcache
Option to export and import the local data...

…for backup or to use in other instances of the app. It's something,
right?
Merge branch 'import-export-data' into gh-pages
Bumped appcache and version
Added twitter link to readme
Added details to active link style
Revert "Added details to active link style"

This reverts commit 92f4775c880e82eb5872e1623f0d5b457aff6d35.
Fixed active link style
Fix flash of selected link style
Fix flash of active link style