Fix stdafx.hpp reference in Math sources

Sources in nfCommon/Math had incorrect reference to stdafx.hpp, which
caused IntelliSense errors.

Verification:
    Build, check if IntelliSense sees everything defined from stdafx.hpp
    when editing nfCommon/Math cpp files.

Change-Id: Icd7d22ba4159b3857a5923440501c56ec4474fa2
Fix boilerplates in nfCommon library

This resolves part of #42. nfCore boilerplates will be fixed later on.

Verification:
    Check if all boilerplates point to proper author and contain correct
    description of file.
    Run doxygen and check if files were parsed correctly.

Change-Id: I5d4a125a04eba546ddb40b72e2a681b0e8465efa
Fix boilerplates in nfCore project

This resolves second part of #42.

Verification:
    Check if boilerplates point to correct author and have proper brief
    description.
    Generate documentation with doxygen and check if all data is properly
    parsed by doxy.

Change-Id: Id66c2ae0f3b9fcdb71471a6d7b0a1a89648724c9