Added support for json object in addition to String as source for typeahead.
Update README.md

Improved styling of the code example
Restored formatting
Added a method getDisplayText to support more generic object.
Merge branch 'master' of https://github.com/MissChocoe/Bootstrap-3-Typeahead
Used displayText instead of getDisplayText, which is more aligned with the other methods names.
Merge pull request #84 from MissChocoe/master

Added flexible support for json object in the source