Add better error messages.

- Fix a typo in VarMul.

Add format record tests.

the order of execution of the action correct since some custom actions
can be scripted and others are run during the script building phase.

Introduce the beginning of group deformating {}.

context with the CRYPT_VERIFY_CONTEXT flag set.

Interface.

Implement dialog events and hook up the dialog code.

*Remove the dwAttributes member from the IGenericSFImpl class, it's
not needed and can't be initialised in Initialize and InitializeEx.

message for the actions we skip. Lines up with native MSI output logs
for ease of comparison.

window.

message name.

RegisterExtension and RegisterMIME actions. We now handle verbs
properly, handle dependancies and such properly and keep track of what
we need to register and what we do not properly.

be able to browse shell namespace extensions.