Speeds up parsing a bit, and makes future extensions easier.

Hurts parsing performance by a few percents, sadly, but I don't see any
other way.

Allows dropping use of fixed positioning, as it is not usable on smaller
screens.
Require clicking to display in-table graphs instead of hovering.
Make graphs dragable (add a dependency on jquery-ui).
Move apachedex-specific javascript to a separate file.
Move apachedex-specific css to a separate file.
Lazily render graphs to speed-up page loading with many graphs.
Also, fix tooltip coordinates inside positioned blocks.
Also, apply formatting to tooltip y coordinate.

Also, italicise -h and --help.

Vary line styles to make column & line groups easier to see.
Likewise for overall column group: separate clearly from periodic groups.

Module listbox links to documents do not have a trailing slash, which skews
results for normal usage patterns.

Also, error-out when no duration is available.

When analysing logs spanning over years, with monthly graph points.

They are more concise than hits per error code when details error is
requested.

Embed main.js. It's too small to justify doing a python module out of a
command-line executable.