apachesolr 6.x-2.0-beta2

#660754: Allow key sorting of facets by jhedstrom: Added Allow key sorting of facets.
#614644: Forms attached to Apachesolr search results won't work by netsensei | robertDouglass: Fixed Forms attached to Apachesolr search
results won't work.
#747346: Typo in apachesolr_search.module by robertDouglass, pwolanin | lazysoundsystem: Fixed Typo in apachesolr_
search().module.
#763072: warnings when indexing old, crappy html by robertDouglass, justinrandell | pwolanin: Fixed warnings when indexing old, crappy html.
#658278: Errors when building the search index in PHP 5.3 by cpliakas | JThan: Fixed Errors when building the search index in PHP 5.3.
#765486: Several cases where Luke cache not getting cleared and resulting in errors by robertDouglass: Fixed Several cases where Luke cache not getting cleared and resulting in errors.
#765448: Facet blocks for hierarchical taxonomy broken by robertDouglass: Fixed Facet blocks for hierarchical taxonomy broken.
#751420: apachesolr_site_hash() calls md5() twice by pwolanin, skwashd | Damien Tournoud, Scott Reynolds: Fixed apachesolr_site_hash() calls md5() twice.
#750426: fieldType textSpell conficts with fieldType text by mkalkbrenner, pwolanin | robertDouglass: Fixed fieldType textTight conficts with fieldType text and textSpell.