cosmetic changes
data_refinement_workflow.beta.t2flow :
 - added refine server check
 - added possibility to use external refine server
 - moved refine server calls to jar

update-beta-to-stable.sh
 - added versioning possibility
pom.xml : removed unused dependencies and added httpclient for httpost (refine)
BaseChecklistClient, AggregateChecklistClient, GBIFBackboneClient, TaxoRESTClient : added new constructor
GBIFChecklistTest : updated to use list
corrected collection date in occurrence response
renamed occurrence package
added refine client code to load / delete data from a given refine server
.gitignore : ignore build / settings dir
dependency-reduced-pom.xml : pom for creating a stand alone jar
cyperaceae.e-monocot.csv, vibrant.csv : sample data files