ERT-592 Set selected case to current case, fix default file path, disable export button if values not valid
iLoop2/ERT-592 branch merged into master
Fix typo
ERT-592 Fix typos and using len() instead of __len__()
ERT-592 Made enkf_node's asGenData typesafe
Merge pull request #520 from flikka/ERT-592-into-master

Ert 592 into master: export case setting, default file path...