Bump 1.5 branch to upcoming 1.5.2

Update maven poms to 1.5.1

Update versions to 1.5.0

Bump to RC3

Tag out failing 1.9 spec

JRuby 1.4-specific maven version goof

Tag out some failing specs in 1.9 mode

Exclude newer native entries

Gah! 1.4 does not have recent on master digest require fix

Update version info for 1.4.0RC2