nuspec update

better SOAP fault handling. timeout for soap requests

Merge branch 'master' of github.com:oenning/SharpSapRfc

Merge pull request goenning#21 from oenning/soap-rfc

SOAP RFC is complete

allow use of table category with data element and new custom exception

fix empty datetime bug

open connection only when necessary

Update README.md

fix for issue goenning#9