added static imports
proper variable name
typo
proper name
added HybridisationNode support
added Accession to the experiment info
 a typo in the code of Unavailable EFO service which caused the StackOveflowError to be thrown. fixes #43
removed check: (warning) PN02 A protocol node should have date specified. fixes #42
added SDRF check: A protocol node should have non empty 'Performer' attribute value. fixes #6
trim whitespaces fixes #6
added check for AEExperimentType comment existence;
started to use predicates and ranges in the list checks;
fixes #37
Merge remote-tracking branch 'origin/develop' into develop
added SDRF check: HTS experiments must not use any array designs. fixes #2
this rule already exists
added check: Values of a experimental factor must vary
fixes #7
bug fix: found that class-based checks are not properly run  (instead of keeping the check runner the same for all items, the new one was created every time)
'technology type' attribute required for HTS experiments only
bugfix: forgot to renew the list of watchers
removed unused code
removed unused code