Added tests on updating manual QC metadata for Sequenom results.
Added some comments on metadata cache behaviour.
Added support for Infinium methylation chips.
Added support for the new inline metadata updates to the publishing
scripts. I missed these in the last commits.

Added a new --reference-zone command line argument to
publish_fluidigm_genotypes.pl
Merge pull request #254 from keithj/devel

Methylation chip support