gmap 6.x-1.0-beta6

This release fixes an issue with macros ignoring their 'center' param.

Changes since DRUPAL-6--1-0-BETA5:

• #311230 reported by meba: Fix 'address' in macro builder.
• #298167 reported by zmove, bobchristenson: Fix info windows for map/node.
• Fix style error in previous.
• Remove an unneeded theme function.
• Fix warnings.
  Make a slight change to how gmap element processing works. This should reduce warnings.
  Add some tests.
• Fixing align brokenness noted in comment 66 of #266595. I was treating a string as an array and accidentally stomping some css classes.
• Critical: Fix 'center' parsing that I broke in the last beta!