DataTable pagination issues with large datasets

[lastlegion]

The DataTable is fairly slow on large datasets with response times 4-8 seconds. We need to look at optimized pagination strategy.

Table pagination and backend processing is fairly unoptimized right now since we make a call to .top(Infinity) on one of the dimensions to get the entire data.

dc-js/dc.js#966 is a useful resource to solve this.

[lastlegion]

Will be solved with #53