update readline library to last version (6.3)
Merge remote-tracking branch 'origin/5_4_mountainlion' into 5_5_mountainlion

* origin/5_4_mountainlion:
  update readline library to last version (6.3)
Merge branch '5_5_mountainlion' into 5_6_mountainlion

* 5_5_mountainlion:
  update readline library to last version (6.3)