Added methods to help decode NDR64

[hackett92]

Finished a project where I needed to decode NDR data with x64 bit pointer sizes. Most of the alignment issues could be fixed by consuming irrelevant data from the stream, however, peeking at the data makes things much more efficient and reliable, which explains the PeekBuffer method. This method reads the given length from the stream and puts the position back to where it was.

Another issue was when reading and aligning 64bit data, the size of a property within a struct was put on the _conformancevalues array, but was never read and removed from the stack afterwards. This caused issues when putting new items on the stack, since it performs a check if the stack is empty or not, skipping adding routine if the stack is not empty.

Added two methods:

• Return the _conformance_values array
• Clear the _conformance_values array

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