return external plugins for physical files only
Merge branch 'master' into ice-cream-sandwich
Merge branch 'beta' into beta-ics
Merge branch 'master' into beta
Merge branch 'ice-cream-sandwich' into beta-ics
look for books in archives
Merge branch 'beta' into beta-ics

Conflicts:
	src/org/geometerplus/android/fbreader/FBReader.java