#153 add support for mapi SPropProblemArray

[Nick Czeczulin]

The existing implementations of SetProps(), DeleteProps(), CopyProps, and CopyTo() had placeholder return values for a SPropProblemArray. This patch enables optionally enabling requesting of detailed errors.

Additional changes introduced:
1. Minor existing documentation fixes.
2. Replaces a call to free() in CopyTo() with delete[]

[Mark Hammond]

4387:e0bd94265138