3.0.0 beta1

First beta of the next major version 3.0.0 is out!

• total rework for Latte 2.4 compatibility
• removed dependency on redefined macro, just use standard define macro! (so much wow!)
• enhanced documentation
• fixed preserving empty filter when empty state is not the default one
• fixed three state sorting when default state is not null, #37
• fixed getter when column name may be virtual and value optional, #45
• fixed unnecessary two request during non-ajax paging, #47
• added getColumn() method, #50
• setFilterFormFactory accepts a null, #49
• see full commit changelog