Add NLL lacrosse

[jgengelhardt]

Scrape from http://nll_stats.stats.pointstreak.com/standings.html. Specify sort by wpct in the URL to tag the wpct cells as "sortcell" to easily find. Iterate through season IDs.

List of season IDs from NLL standings webpage source:

<option value="19855" selected>NLL 2020 Season</option>
--
  | <option value="19360" >NLL Playoffs 2019</option>
  | <option value="18464" >NLL 2019 Season</option>
  | <option value="18167" >NLL Playoffs 2018</option>
  | <option value="17281" >NLL 2018 Season </option>
  | <option value="17084" >NLL Playoffs 2017</option>
  | <option value="15914" >NLL 2017 Season</option>
  | <option value="15797" >NLL Playoffs 2016</option>
  | <option value="14886" >NLL 2016 Season</option>
  | <option value="14244" >NLL Playoffs 2015</option>
  | <option value="13569" >NLL 2015 Season</option>
  | <option value="13568" >NLL Playoffs 2014</option>
  | <option value="13566" >NLL 2014 Season</option>
  | <option value="13565" >NLL Playoffs 2013</option>
  | <option value="13563" >NLL 2013 Season</option>
  | <option value="13562" >NLL Playoffs 2012</option>
  | <option value="13560" >NLL 2012 Season</option>
  | <option value="13556" >NLL Playoffs 2011</option>
  | <option value="13554" >NLL 2011 Season</option>
  | <option value="13553" >NLL Playoffs 2010</option>
  | <option value="4905" >NLL 2010 Season</option>
  | <option value="4139" >NLL Playoffs 2009</option>
  | <option value="3260" >NLL 2009 Season</option>
  | <option value="2890" >NLL Playoffs 2008</option>
  | <option value="1995" >NLL 2008 Season</option>
  | <option value="1841" >NLL Playoffs 2007</option>
  | <option value="1322" >NLL Regular Season 2007</option>
  | <option value="1231" >NLL Playoffs 2006</option>
  | <option value="977" >NLL Regular Season 2006</option>
  | <option value="748" >NLL Playoffs 2005</option>
  | <option value="686" >NLL Regular Season 2005</option>