info.xml - Don't officially list 4.6 compatibility
info.xml - Don't officially list 4.6 compatibility

To run on CiviCRM v4.6, you need to specifically use v4.6.26+ along with the
patches from [PR #9555](https://github.com/civicrm/civicrm-core/pull/9555).
Although I do expect some folks will use the patches, it doesn't feel
accurate to list it for general consumption on 4.6 sites.

Note: You can enable/use extensions regardless of what's in the
`<compatibility>` / `<ver>` tags.  The tag's main purpose is to filter the
list of extensions advertised in the public directory.

rocxa/uk.co.vedaconsulting.mosaico,veda-consulting/uk.co.vedaconsulting.mosaico,veda-consulting/uk.co.vedaconsulting.mosaico,rocxa/uk.co.vedaconsulting.mosaico,veda-consulting/uk.co.vedaconsulting.mosaico,rocxa/uk.co.vedaconsulting.mosaico,veda-consulting/uk.co.vedaconsulting.mosaico,rocxa/uk.co.vedaconsulting.mosaico