Edited Unassigned: underscore prefix not CLSCompliant [151]

Since the fix for Issue #133 an underscore prefix is added to generated class names of Editor- and DisplayTemplates.

However, class names prefixed with "_" are not considered CLS compliant.

I tried to use directive "TrimLeadingUnderscores" to avoid the prefix.
However, it appears as if the directive is applied *BEFORE* the "_" is inserted.

I see two possible solutions:
1. "_" is replaced with a CLS compliant prefix (or postfix)
2. directive "TrimeLeadingUndescores" is applied *AFTER* the "_" is inserted (and hence will remove it)