[SANTUARIO-388] - Add support + testing for RIPE-MD160 digest algorithm

git-svn-id: https://svn.apache.org/repos/asf/santuario/xml-security-java/branches/1.5.x-fixes@1596205 13f79535-47bb-0310-9956-ffa450edef68
Optimisation to avoid needlessly creating a MessageDigest algorithm where it isn't required


Conflicts:
	src/main/java/org/apache/xml/security/signature/Reference.java

git-svn-id: https://svn.apache.org/repos/asf/santuario/xml-security-java/branches/1.5.x-fixes@1596206 13f79535-47bb-0310-9956-ffa450edef68
[SANTUARIO-389] - Add support + testing for SHA-224 digest algorithm

git-svn-id: https://svn.apache.org/repos/asf/santuario/xml-security-java/branches/1.5.x-fixes@1596207 13f79535-47bb-0310-9956-ffa450edef68
Fixing build with JDK 5

git-svn-id: https://svn.apache.org/repos/asf/santuario/xml-security-java/branches/1.5.x-fixes@1596208 13f79535-47bb-0310-9956-ffa450edef68