Update History changelog for 0.5.3
Update History changelog for 0.5.3

yahonda/ruby-plsql,rsim/ruby-plsql,JDominator/ruby-plsql,yahonda/ruby-plsql,jgebal/ruby-plsql,jgebal/ruby-plsql,rsim/ruby-plsql,jgebal/ruby-plsql,JDominator/ruby-plsql