Update much of the code for Omeka 2.0.  Changed Google API path.  Add pagination to browse report page.
Change storagePrefix config variable to storagePrefixDir.  Remove reports_save_directory, and instead use canStore tests on the Reports_File object so that it checks the Omeka_Storage object, which may or may not use file system.  Fix delete files so that it uses the storage object and not the file system directly.  Fix various methods that no longer exist in Omeka 2.0.   Issue #12
Merge pull request #13 from willynilly/issue_12

Fix Issue #12