entityreference_autocomplete 7.x-1.10

Main Change. Fixes broken compatibility with changes introduced in Drupal 7.39.

#2561431: Elements with autocomplete require #autocomplete_input since Drupal core 7.39.

Other fixes and new features:
#2513724: Typo in README
#2536968: Access to full entity object in hook_entityreference_autocomplete_matches_alter
#2565713: Warning:: Invalid argument supplied for foreach() hook_entityreference_autocomplete_matches_alter()
#2565677: Notice: Undefined variable: prefix in function entityreference_autocomplete_autocomplete_callback()
#2557353: Autocomplete broken when search term contains a slash
#2544794: Major interference from Fast404
#2501163: urlencoding of ajax url
#2353169: entity reference for users should use realname

The 'era_query' tag has been added to the EntityFieldQuery used for autocomplete searches, to allow other modules to alter it (e.g: Realname module to change where the username is searched).
The search string entered by the user is added as query metadata ("era_search_string").