Fix too short logging arrow.
Use setup rather than configure. It's more accurate.

Fixes #74.
Move away from enable/disable command line flags, use --name=BOOL.

Fixes #73.
Change documentation strings of default features.

To cope with the new specification scheme.
Switch to true/false booleans in Makefile.

Rather than 0/1. To be consistent with command line option spec.
Merge pull request #77 from dbuenzli/love-the-bool

Love the bool