Adding sermon list (설교동영상)

	modified:   res/layout/sermon.xml
	modified:   res/raw/json_ormlite_config.txt
	modified:   src/main/java/org/sdhanbit/mobile/android/activities/Sermon.java
	modified:   src/main/java/org/sdhanbit/mobile/android/database/JsonFeedDatabaseHelper.java
	modified:   src/main/java/org/sdhanbit/mobile/android/entities/FeedEntry.java
	modified:   src/main/java/org/sdhanbit/mobile/android/managers/FeedEntryManager.java
	modified:   src/main/java/org/sdhanbit/mobile/android/schedulers/JsonReaderScheduler.java