Added switch to ready_infinium.pl to allow Fluidgm QC data to be selected.

Revised the SNP database query for Sequenom to ignore SNP mapping
positions (there are sometimes multiple positions).

Added cross-check of Sequenom results against the SNP manifest
(multiplex composition does not always agree with data in SNP).
Further improvement to SNP db query which returns unconcatenated SNP
names.
Merge pull request #221 from keithj/devel

Revised the SNP database query for Sequenom