QuickNXS: Resolve hardcoded instrument values

[eXeC64]

This issue was originally TRAC 10924

aglavic/quicknxs#5 introduces many comments annotating areas of the QuickNXS code that are troublesome for ISIS. These hardcoded values and strings need to be resolved before ISIS can begin to use QuickNXS.

There are three comments introduced:

• TODO MAGIC NUMBER - Highlights a hardcoded numbers
• TODO HARDCODED STRING - Highlights hardcoded strings
• TODO HARDCODED INSTRUMENT - Highlights hardcoded dependencies on an instrument

They should be easily findable using git grep. The goal of this ticket is to review each highlighted area and resolve it, until all of the TODO comments have been removed.

[eXeC64]

@NickDraper (2015-05-12T14:03:07):
Moved to R3.5 at the end of R3.4

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