Add support for exporting to about:memory format

This adds an [export] link to each checkpoint in the detailed view as requested
in issue #29. Once the data as exported the the [export] link will be replaced
with a [download] link.
Merge pull request #38 from EricRahm/export_about_memory

Add support for exporting to about:memory format
[html] Use button class for [export] link
[html] on click, change [export] to [exporting...]
Merge pull request #40 from Nephyrin/exportlink

Exportlink
[html] Use absolute path for about_memory_worker

For /mobile/
Fix testing builds after Bug 1010064
updated latest mozmil github repo link
Merge pull request #41 from swarnava/master

Updated latest mozmil github repo link