Fix problem with expiration value in ShareXMLParser
Fix a problem in ShareXMLParser.java, with the expitation date
Use WebdavUtils.parseResponseDate for parsing expiration date in ShareXMLParser
Changes from  comments in PR#442, in oc-project
Revert "Changes from  comments in PR#442, in oc-project"

This reverts commit 3bf858e2a7ea154e4a00e98fe95d98153b416bbf.
Changes from  comments in PR#442, in oc-project
Merge pull request #17 from owncloud/share_link__reuse_link_shared_in_server

Some fixes in operation of Shares