Delay load graph engine dll

[joseartrivera]

Partially addresses #209

Description of the changes:

• Delay load graph engine DLLs until the code needs them.

How changes were validated:

• Manual tests, checking modules in VS to verify that the omsaut.dll and graphengine.dll are loaded only when the user enters graphing mode

[mcooley]

@joseartrivera code looks good to me. Do we have before/after perf numbers for this change?

[joseartrivera]

@joseartrivera code looks good to me. Do we have before/after perf numbers for this change?

Last I checked the change in perf is not perceivable on my machine but I think this is a good change to have anyway for slower machines and reducing the amount loaded in memory.

[mcooley]

OK, I figured the launch latency improvement would be small. Working set reduction seems like a worthy goal.