New features

• added new snakefile multiplates.smk to run multiplates pipeline. Have a look at README multiplates.
• added the possibility to correct a factor with deseq2 by adding a column in the samplesheet. Procedure described in README.

Bug fix

• The absence of annotGo.txt and annotKegg.txt caused the creation of the report to fail. Added check to see if they exist before creating the datatables in report.