new methods `rowOffset`, `colOffset`, `countVisibleRows`, `countVisibleCols`
code cleanup; remove redundant method grid.clear
 removed options `minWidth`, `minHeight` because their definitions were to blurry and usage case too limited
performance: use forceFullRender flag to control if full data is rendered or only the border
cleanup: remove redundant autofill methods
new callback `onCreateRow`; `dataSchema` can now be a function that returns object/array
return reference to HT instance
bugfix: lost focus when adding row below, column on the right, or removing a row/column
bugfix: enter on last row/col should add more rows/cols if minSpareRows/minSpareCols > 0
code cleanup; document previously undocumented method render
code cleanup; document previously undocumented method render
bugfix: pressing enter/tab in autocomplete moves to next row/column
bugfix: CTRL+A works slow on large data sets (as reported by @brivazac / #295)
walkontable optimization
add z-index to show the grid above code in the right column
bugfix: scrolling viewport when cell dimensions are significantly bigger than assumed by Walkontable
bugfix: page up/page down
public methods `setCellReadOnly`, `setCellEditable` are removed. Use `readOnly` cell property to make a cell read-only. See `demo/readonly.html` for examples
bugfix: rounding errors (fix #326)
observe JS files in lib/