am b00f26a1: Merge "update web app docs to remove target-densitydpi, remove the overview page, remove a bunch of stuff from the doc about screens and refer to external docs instead, and add tips about debugging on 4.4 w/ dev tools." into klp-docs

* commit 'b00f26a1722e3a31dca48bf47568ee54686dba30':
  update web app docs to remove target-densitydpi, remove the overview page, remove a bunch of stuff from the doc about screens and refer to external docs instead, and add tips about debugging on 4.4 w/ dev tools.