added the query at sample level based on fields. we'll have to discuss its scope.
restricted most of eval
added type checks
expanded errors. Added strict typematch.
added IGNORE status for sample
removed prints and added project sequenced status
changed the name of mean_autosome_coverage to mean_autosomal_coverage
removed commented eval
Merge pull request #42 from Galithil/master

I'm going to merge that, else the next devs might make this hard to read. Besides, we might need this on tuesday.