bug 976077 - Part 1: Change utils.parse_dump to return the same format as the stackwalker JSON output, and change the report/index template to match
bug 976077 - Part 2: refactor bits of parse_dump out to be usable for enhancing the json_dump
bug 976077 - Part 3: switch to using json_dump to build report/index
Merge pull request #2192 from luser/report-index-json

Switch report/index to use json_dump