remove DragDealer (only native scrollbars from now on)
Added getHtCore spec helper and fixed countRows/Cols
Fixed Core_alterSpec.js to work with native scroll
Added missing fields initialization in scrollNativeVertical
Removed unused method from abstractFilter
_doDraw method decided into smaller functions and moved to WalkontableTableRender class
Setting initial horizontal scrollbar height
Closing editor on scroll
Fixed abstractFilter, cellCoords, columnStrategy, core, rowStrategy specs for Walkontable.
Do not watch for file changes in walkontable/test directory
Fixed tests for Walkontable (only tests with custom row/col sizes fails)
Fixed selecting cells and getLastVisibleColumn()
Fixed vertical keyboard vertical navigation, when there is no fixed rows.
Fixed horizontal keyboard navigation, without fixed columns
Fixed opening cell editor, when viewport is scrolled
Fixed destroying Walkontable
Fixed native_div demo
Fixed vertical scrolling down using keyboard in window native scroll
Fixed vertical scrolling up using keyboard in window native scroll
Fixed vertical scroll using keyboard in window