dragging items in catalog manager, keeping link orders in the network library, subTree => subtree
cs-catalogs-reorder branch has gone
Merge branch 'master' into position-2
'icons' catalog has gone
Merge branch 'master' into position-2
list views: scrolling speed optimization
Merge branch 'master' into position-2
code review: several consequent method calls
2 fields => 1 field
formatting
fixed strange RationalNumber constructor behaviour
better RationalNumber creation method
Merge branch 'master' into position-2

Conflicts:
	src/org/geometerplus/zlibrary/core/util/RationalNumber.java
fixed mistyping
Merge branch 'master' into position-2
Book.myProgress field
Merge branch 'master' into position-2
progress field (in progress)
Merge branch 'master' into position-2
position => progress in xml