Merge pull request #7 from mluisbrown/master

Handle table views where contentInset.top != 0 which is often the case in iOS7
pass all init methods to the designated initializer. Closes #9

The designated initializer is initWithFrame:style: for UITableView.
From Apple's documentation: "Designated initializers are chained to
each other through messages to super; whereas other initializers are
chained to the designated initializer of their class through messages
to self."
Closes #6. Fix dragging issues where cells are variables heights.

Previously the delegate had to keep track of the height of the cell
being dragged. Adding the draggingRowHeight property allows easier
manipulation in cases where cells are variable heights.
update readme
Adding respondsToSelector Method
cleaning code
Merge pull request #11 from emansim/master

Adding else statements along respondsToSelector check