Rename URLHandler and KoreUtil classes to InternalUrlsHandler and KoreUtils.
Move InternalUrlsHandler, KoreUtils, TextLinkfier, ShareUtils classes to external_communication subpackage.
Remove unused param showPreviewText in shareText method of ShareUtils class.
Add initial work to be able to display an image preview of the content shared (not for downloads).
Use a better regular expression to parse timestamps in plain text descriptions.
This commit adds support for opening plain text timestamps by parsing the description text using a regular expression, add a click listener for each timestamp which opens the popup player at the indicated time in the timestamp.
In order to do this, playOnPopup method of the URLHandler class. Also, handleUrl method of this class has been renamed to canHandleUrl.