Minor formatting change in help text.
Fix "Home" button in SNR estimator page.

Fixes #288
Merge remote-tracking branch 'upstream/Hackathon2014' into devel
Fix file browser in SNR estimation page, which failed to list sub images.
Make a distinction between False and 0 in database result query.

- Otherwise the 'defaultValue' function fails to return the '0' default value of a parameters (see autocrop in possible_values table).
Correct logic check one default value.
Add link to HRM mailing list in login page.
Changes in 'nav' names.
Increase HuCore requirement: 14.06.1p6

- This is needed so that HuCore can read tiled OME-TIFF images.
- These images are likely to make it into HRM via the HRM-OMERO connector.