implemented topic reponse time line chart

refactored charts to share common logic + code + view
element id's (required by non angular libs)are now generated with high degree of uniqueness

could @ByronDarlison @tejohnso @alexey-rise @alanclayton review?
branch is hosted at: http://devtools1.risevision.com:8000/#/

note: ATOW, BigQuery seems to be extra slow....