Update HISTORY file and update release to 5.0.2

Update HISTORY file

Add forgotten Galician language to the "all" target of the Makefile

Stamp 5.0-beta2

Update Spanish translation ofr PPA5.0

Release 4.2.3

Release 4.2.2

Cleans a little bit the code and add the total number of rows in pagi…

…nated mode

 * remove bad named $str and $str2 vars
 * use booleans $has_object and $has_subject instead of reapeting
   isset() many times
 * add some code comments
 * code cleaning around printTitle in doBrowse
 * add total number of rows in the relation (see #782258 feature request)

bump version for 4.2.1

update HISOTRY for 4.2-Beta-2