Refactored Refraction Reflection shader

Adding in new functions for fresnel, and latitude longitude environment
map texture lookup call for the reflection refraction shader.
Refactored Reflection Refraction shader

Cleaned up the code a bit and switched out the functions where they
where needed. Removed (IdotN < 0.0) ? N : -N; style calls because they
where not doing anything.
Name Space

Putting a space in the name ID for the nodes so they look right in the
Mari display names.
Xml Tab

Tabbing over the glsl code so it matches the right tab set in the xml
file.
Xml clean up

cleaned up all the procedural nodes so the xml files are all the same in
format and spacing. Also added in the attribute comment spacing to
seperate the attributes. al xml files are using space with 4 tab.
Node format cleanup

Cleaned up the rest of the files for formatting and making sure they are
all 4 tab width and white spaces. Removed any trailing whitespaces as
well.
Arch Vis Attribute Re-group

Take the attributes and grouping them to properly match the Maya Mia
Material for future possible Mari to Maya Bridge.
Adding Antonio Neto's Falloff Map node

Adding in a new Falloff Map node. Placing the new node under a Utilities
section since its more of a place holder lighting utility node for
visual appearance.
Arch Vis Shader Rename

Renaming the architectural node so it shows up as the proper Mia
Material, since its the Mental Images Architectural shader from Mental
Ray. This is to keep shaders consistent with there counter parts for a
possible future Mari to Maya bridge.
Name Addition

Adding in new tag for nicks brdf library to display properly on python
console load up
Documentation Updates

Updated Node Histories, added new Function Library requirements, added
MAC path to Script folder
Release Notes for v1.20
Release Notes for 1.20
Release Notes for 1.20
deprecating OE_NormalMapMerge

No longer necessary since MARI provides the functionality now
Release Notes for 1.20
changed location of Falloff Map

- moved Falloff Map under "Environment"
- updated Notes.
Added Samples, license, docs for NB_ Procedurals
Docs, License, Sample for AN_FalloffMap
docs, license + samples for NB Shaders