Release v0.6.0 - Enhanced ISA-Tab r/w performance and more

This release of isatools focuses on further performance enhancements to the existing API functionality, in particular the ISA-Tab r/w, and a range of new features:

• Performance enhancements to ISA-Tab read and write #184
• New feature to load and dump only Investigation file of ISA-Tab #185
• New feature to export ISArchive zip from ISA content #180
• New feature to search Ontology Lookup Service and return OntologyAnnotation object #1
• New feature to search Entrez for publications and return Publication object #157
• New feature to merge Study and Assay table ISA-Tab files (of same assay type) #186
• Refactoring of example data and tests data to pull from centralised https://github.com/ISA-tools/ISAdatasets repository #78 #183
• Bug fixes to ISA-Tab investigation file loading issues #196 #197

For more information on the known issues with this release, please check the documentation at http://isatools.readthedocs.org