renamed es_search* fxns to remove es_ prefix, renamed files too
renamed ping file to remove es_
renamed search to es_search as apparently check does not like that
updated news with es_search remaining with prefix
added preference man file for prefernces
added fxn search_shards from search apis, #25
fixed non-ascii quote
fixed docs_get fxn
added new fxns to saerchapis manual page
fixed non-ascii string in searchapis man file
 added explain fxn as part of search apis #25