Upgrading to karma 0.12
Fixing karma location.

Because installing a dep just for that…
Pursue tests when segments are ready.
Temporarily switching to JSON data files.

Binary files are broken since karma-runner/karma@8a30cf55751bbaec672597f4f0ed66fe8742095f.
Increased timeout to avoid test failures.
Merge pull request #39 from bbcrd/fix-karma012

Fixing the `FAILED Peaks.segments "before each" hook` breaking CI