Library service intent action declaration
new TODO item
do not add a book with id = -1 to BookCollection
synchronization with library-service branch + constants are moved from Library to LibraryTree
Merge branch 'master' into library-service

Conflicts:
	src/org/geometerplus/fbreader/library/AuthorTree.java
	src/org/geometerplus/fbreader/library/BookInSeriesTree.java
	src/org/geometerplus/fbreader/library/BookTree.java
	src/org/geometerplus/fbreader/library/FavoritesTree.java
	src/org/geometerplus/fbreader/library/FileFirstLevelTree.java
	src/org/geometerplus/fbreader/library/Library.java
	src/org/geometerplus/fbreader/library/LibraryTree.java
	src/org/geometerplus/fbreader/library/RecentBooksTree.java
	src/org/geometerplus/fbreader/library/SeriesTree.java
imports cleanup
introduced BookWithAuthorsTree class
Merge branch 'master' into library-service

Conflicts:
	src/org/geometerplus/fbreader/library/Library.java
	src/org/geometerplus/fbreader/library/LibraryTree.java
synchronization with library-service branch
Merge branch 'master' into library-service

Conflicts:
	src/org/geometerplus/fbreader/library/Library.java
AuthorListTree
Merge branch 'master' into library-service
synchronization with library-service branch
Merge branch 'master' into library-service

Conflicts:
	src/org/geometerplus/fbreader/book/BookCollection.java
unnecessary cast
synchronization with library-service branch
Merge branch 'master' into library-service

Conflicts:
	src/org/geometerplus/android/fbreader/library/LibraryActivity.java