Switched from genotype-call to g2i for format-shifting GTC to Plink BED.

Removed genotype-call conversion methods

Added g2i conversion method, shimmed to give it the same signature as
the genotype-call method (g2i has different argument conventions from
genotype-call)

Fixed incorrectly named test class (TestSimtoolsTasks was called
TestGenotypeCallTasks)
Use mysql_auto_reconnect for connections to the Sequencescape warehouse
Added a script to export Sequenom data to a directory instead of to iRODS