Responsive improvement and fix header cells width

[bascoder]

Responsive

I moved the anonymous function to a named function. I added a window resize handler that will call InitStickyHeaderseInit(). This function removes the old sticky header and handlers. Finally it will call initStickyHeaders() again.

Cell width

To fix the header cell width I changed line 30 to use the outerWidth() property instead of width(). This will take the full width of header cells.