 Version 7.1.0

* likely fixed the timeSpent number seen on Statistics
* another structural change: flattened FeedPreferences class into Feed
* changed message texts when importing DB
* added ability to import podcast directory from Podcast Addict for offline search
* removed fulltext search to reduce DB size and support double-byte language searches, search appears fast enough
* SearchFragment shows results in tabs: Episodes, Feeds, and PAFeeds
	* items appear in PAFeeds if you have imported a local directory from Podcast Addict
	* PAFeeds is nice, but it's experimental, let me know your experiences
* in SearchFragment fixed number of episodes in infobar
* in SearchFragment, subscriptions are shown in a column
* added url re-direct ability in OnlineFeed fragment
