Support registration of JPEG plugins when the classloader can't find sun plugins.

In some situations, the classloader may not be able to find the sun jpeg plugins
even if they are registered.  In this case, we can still find the sun plugins by
iterating over all the registered plugins.
Return immediately when the right sun jpeg plugin is found.
TMI-34: Handling of problematic Corbis RGB ICC profiles.
Merge branch 'master' of github.com:haraldk/TwelveMonkeys
Merge pull request #32 from rtimpe/master

Support registration of JPEG plugins when the classloader can't find sun plugins
TMI-32: Cleanup after merge. Removed filter + code style changes.
TMI-32: Cleanup after merge. Removed filter + code style changes.
TMI-32: Cleanup after merge. Removed filter + code style changes.
WMFImageReaderSpi issue
o Preparing for release.
[maven-release-plugin] prepare release twelvemonkeys-3.0-rc5
[maven-release-plugin] prepare for next development iteration
Added failing testcase for JPEGImageReader.
Fix reading jpeg images where last scanline is higher than the y
source subsampling offset.
TODO: Fix/file OpenJDK bug.
TMI-38: Fixed a bug in the getSourceCS method, that incorrectly identified non-subsampled JFIF files, as RGB instead of YCbCr.
Merge pull request #39 from escenic/upstream

JPEGImageReader throws "IllegalStateException: sourceRegion.height <= subsamplingYOffset!"
TMI-39: Cleanup after merge.