1) Gracefully handle the case where retrieving the range of Table Entries retrieves a placeholder entry.

2) Workaround the horrible limit of 64KB max Table Property size which sometimes stops us saving elmah logs!
One liner. Better error message formatting.
Merge pull request #1004 from NuGet/tilovell-990-horrible_problems_in_azure_table_error_log

Fix data loss issues in Azure Table Log