Marvin Beta 2.7.2

This release is a small release mainly for Marvin Web.

Changelog

• Small tweaks to the web interface: added tooltips, updated link to SkyServer
• Adds default bintype to Explore page
• Fixes #551 - fix z-index bug in Guided Query Builder
• Fixes #142 - add link to Simbad

What's Changed

• Various updates to the web display by @havok2063 in #764

Full Changelog: 2.7.1...2.7.2