Update of RNASeq documentation and check_designfile.pl
- The explanation of the design file should be updated to clarify that in addition to sampleIDs not starting with numbers, they should also not contain characters such as "." and "_".
- check_designfile.pl should be updated to check for this and end the run immediately if these characters are found. Currently, all steps in pipeline will complete successfully until the "statanal" step is reached where it will then fail.