Some improvements

o Fixes the problem with download folder
o Improves several get functions
o Improves the wrapper for the getter functions bef.portal.get()
o Updates the newsfile

o Try functions:

bef.portal.get(full_url = "http://befdatadevelepment.biow.uni-leipzig.de/datasets/8/download.csv?user_credentials=Yy2APsD87JiDbF9YBnU")
bef.portal.get(dataset_id = 7)

bef.portal.get(full_url = "http://befdatadevelepment.biow.uni-leipzig.de/keywords")
bef.portal.get(keywords=T)

bef.portal.get(full_url = "http://befdatadevelepment.biow.uni-leipzig.de/paperproposals/2/?user_credentials=Yy2APsD87JiDbF9YBnU")
bef.portal.get(proposal_id = 2 )

bef.portal.get(full_url = "http://befdatadevelepment.biow.uni-leipzig.de/datasets/8.eml")
bef.portal.get(dataset_id = 8)
bef.portal.get(dataset_id = 8, metadata = T)
bef.portal.get(dataset_id = 7, attachments = T)

bef.portal.get.dataset_list(keyword = "datetime")
bef.portal.get.dataset_list(keyword_id = 42)

bef.portal.get(keyword = "datetime")
bef.portal.get(keyword_id = 42)