Merge pull request #440 from hinerm/scifio-tools-pom

Fixed scifio-tools pom.xml
AFI: fix thumbnail retrieval
Fix type checking tests for AFI data
merge develop -D org -I include -E exclude: PR 159 (Improve .ndpi support)
merge develop -D org -I include -E exclude: PR 351 (Add SPW support to FakeReader)
merge develop -D org -I include -E exclude: PR 424 (Specification changes for 2013-06 release)
merge develop -D org -I include -E exclude: PR 438 (Fix the autogenerated metadata field counts (rebased onto develop))
merge develop -D org -I include -E exclude: PR 439 (Add support for Aperio AFI data)