annotate module supports limits
assembly module supports limits
converted Assembly to base class and added VelvetAssembly subclass
added SpadesAssembly subclass
set limits for assembly and annotation global configs - temp fix for running tests
removed global assembly and annotation files
moved remove_primers to Assembly from SpadesAssembly
added eukaryote_register_and_qc_study
added bacteria_register_and_qc_study
added bacteria_register_and_qc_study tests (work in progress)
fix assembler parameter
updated usage text
Merge pull request #28 from CraigPorter/update_usage_text

updated usage text
moved normalise to base class
removed normalise
updated usage info
added helminth_register_and_qc_study
added normalise
added virus_register_and_qc_study
register and qc tests updated