SequencesLoader: the Illumina export format is now supported

I decided to implement the export format because some datasets in
Amazon EC2 are in this format. This change is quite simple and
without any impact on the algorithms.

This dataset is in export format:

SNAPSHOT    snap-53b3cb3a    vol-ce0dcba7    completed
2010-01-10T20:48:42+0000    100%    947081328633    350    Illumina -
Jay Flatley Genome Data Set (Linux)

Signed-off-by: Sébastien Boisvert <sebastien.boisvert.3@ulaval.ca>