Add load support for Olympus E-PL2.
Add load support for Olympus E-PL2.

git-svn-id: 04e88ac4940b0408b73cd6f458a224a262abaaff@326 ec705bc8-faf6-4f9b-9aff-b4916e9bedc3

jbuchbinder/rawspeed,jbuchbinder/rawspeed