Building OSL on Windows OS

[madoodia]

Description

This PR will add a method of building OSL on Windows OS.

The whole process is explained in an md file in doc/build_install/windows directory

Tests

I've tested the whole process on Windows 10 and OSL is installed successfully

Checklist:

• I have read the contribution guidelines.
• I have previously submitted a Contributor License Agreement.
• I have updated the documentation, if applicable.
• I have ensured that the change is tested somewhere in the testsuite (adding new test cases if necessary).
• My code follows the prevailing code style of this project.

[mprater]

Thanks Reza. I wonder if you could convert the .odt file to .md or .rst? We'll want documentation to use either of those formats in the future.

I used .odt as a quicky container for content I grabbed from elsewhere.

[madoodia]

Thanks Reza. I wonder if you could convert the .odt file to .md or .rst? We'll want documentation to use either of those formats in the future.

I used .odt as a quicky container for content I grabbed from elsewhere.

Sure, I'll do that
Sorry

[mprater]

It appears that many of these files contain copyright notices in their comments. Those ought to be removed; or replaced with:

Copyright Contributors to the Open Shading Language project.

[madoodia]

Copyright Contributors to the Open Shading Language project.

I see
so errors are because of them
I'll remove them
thanks for letting me know

[mprater]

I have no way to test any of this, but what's here looks okay to me. Thanks Reza!

[lgritz]

I think you have an opening single quote here, that does not have a corresponding closing quote.

[madoodia]

I fixed this one

[lgritz]

If this contains any code copied from USD, we need to reproduce their copyright and license information here to be in compliance with that project's Apache 2.0 license.

[madoodia]

I've added copyright notice to all files
just I'm not sure about the Pixar USD reproduced copyright
please check the file

[lgritz]

Here's how I think the header of this file should read:

# Copyright Contributors to the Open Shading Language project.
# SPDX-License-Identifier: BSD-3-Clause
#
# Portions of this file were derived from USD, which has the following notice:
# Copyright Pixar
# Apache 2.0 license with modifications: https://github.com/PixarAnimationStudios/USD/blob/release/LICENSE.txt

[lgritz]

Every file (if at all possible) in the project needs both of these lines somewhere (usually as comments at the very top of the file):

Copyright Contributors to the Open Shading Language project.
SPDX-License-Identifier: BSD-3-Clause

We use BSD-3-Clause for code files, but if the file is purely documentation, we instead use a Creative Commons license, so that would instead read:

SPDX-License-Identifier: CC-BY-4.0

Any material "imported" from any other project -- that is, not written from scratch for the OSL project -- should have a comment that says (a) The copyright notice preferred by the project it came from, (b) the appropriate SPDX identifier for the license used by that project, and (c) exactly which code that applies to (this whole file? a particular function or set of functions? just these three lines?).

Also the top-level file THIRD-PARTY.md details reproduces the licenses used by any third-party bits in our code base, and says which parts/projects are associated with which license.

[madoodia]

Thanks @lgritz
I will edit files

[mprater]

Merging now. Will make English language edits at a later time.

[madoodia]

Merging now. Will make English language edits at a later time.

Yes, it needs lots of edits.
thanks though @mprater