Ignore default Emacs server auth dir

The server-auth-dir is where Emacs stores authentication files for Emacs
servers (running over TCP). These are (usually) ephemeral in nature, and
should be ignored.

Ignore .venv files created by auto-activation scripts

Update license year to 2016

Update Node.gitignore

Ipython Notebook checkpoints

Ignore files generated by NuGet v3 project.json

Ignore playground files

Comments

Just added some comments. Some of us don't need some of the lines in the file.

Remove `build/` suppression

Exclude Latexian temp files for Tex documents

Include lib64 for virtualenv

Latexian adds some additional temporary files, which are not required for building the project. Therefore they are better left out as well

On systems that require a lib64, virtualenv creates a symlink to the local lib.

Add TeX precompiled preamble and xypic

Ignore ApplicationInsights.config for Microsoft Azure

A precompiled header(`latex -ini`) compiled creates a `.fmt` file.
To speed up xypic's drawing, precompiled matrices are created with the `\CompileMatrices` entry in the preamble. This creates `*.xyc` files.

Fuse hidden

Update Eclipse.gitignore

Remove .gradle because it is not eclipse specific and already added in Gradle.gitignore.

Windows Azure -> Microsoft Azure. Due to https://azure.microsoft.com/sv-se/blog/upcoming-name-change-for-windows-azure/

Ignore Azure ApplicationInsights.config in VisualStudio.gitignore

Stop ignoring StyleCop.json

The authoring of NuGet packages quite often include `build` folders, and when this is .gitignore'd it's very often the source of bugs in files that don't get checked in.

I've never seen a Visual Studio project that builds to a `build` folder (`bin` is the default name). As this is a Visual Studio template file, and we have real projects that include `build` folders that include source code, I recommend we remove suppression of this folder.

StyleCop.Analyzers is the modern re-invention of StyleCop, and uses a StyleCop.json file that the default .gitignore file made very difficult to check in, and easy to think was checked in but isn't.
See https://github.com/DotNetAnalyzers/StyleCopAnalyzers/blob/32057fff82adf7cfb92aa50aef69a6b030eedf31/documentation/Configuration.md#source-control for the documented case.

Looking through history, this line was last touched to make it case insensitive, and before that the line was in the original VisualStudio.gitignore file, without justification for why it should ignore all file extensions. From my experience with stylecop, the only file I remember it creating was stylecop.cache. I would change `[Ss]tyle[Cc]op.*` to `[Ss]tyle[Cc]op.cache` but there is already a line for suppressing all *.cache files (which wasn't there when the stylecop line was originally added). So I believe this line is now obsolete, and as I explain above, actually problematic.

Ignore auxiliary files from \usepackage{cprotect}

[cprotect](https://www.ctan.org/tex-archive/macros/latex/contrib/cprotect?lang=en) tracks its contents in an auxiliary file, this is safe to ignore.

Add new line at end of file

Ignore BundleArtifacts folder

Bugfix - Typos in comments