Go: Add '*.exe~' to .gitignore

When you build a Go executable, which does already exists and is in use on Windows (e.g. running) then the output binary name will be extended by a '~' prefix.
https://github.com/golang/go/blob/558eeb2d850d064b0b02b65a7bf3af6c108c248d/src/cmd/go/internal/work/exec.go#L1165-L1170

* Update Eclipse.gitignore

* Update Eclipse.gitignore

* Add *.snk strong name key files

Strong name key files shouldn't be included in a repository AFAIK. they are intended to sign build output to verify that it comes from the correct publisher. having an *.snk in a repository would allow anyone to produce build as if they were the original publisher.

I guess some OSS projects might like to have *.snk files in their repos but that would be an exception to the rule.

* Make use of *.snk optional

Add note explaining use.

* Reduce explanation

Just use a link instead

https://codex.wordpress.org/Must_Use_Plugins

Added extensions for prepackaged app and toolbox file, pregenerated helpsearch folders.

Rails 5 uses npm to handle javascript dependancies, node_modules should not be checked in to git.

The out of date models flag is automatically generated by the system, we don't want this in Git

ref http://msbuildlog.com/

Add .jekyll-cache/ as per envygeeks/jekyll-assets

* Update Unity.gitignore

Prevents directories: `Library`
`Temp`
`Obj`
`Build`
`Builds`
`Assets/AssetStoreTools`
from being included in the remote if the project sits in the `Assets` folder.

* removed wildcards from Unity's .gitignore

Prevents directories: `Library`
`Temp`
`Obj`
`Build`
`Builds`
`Assets/AssetStoreTools`
from being included in the remote if the project sits in the `Assets` folder.

* without . the auto directory is still considered for commits

* small addition that ensures all Emacs-Lisp files (.el files) are ignored

* Update VisualStudio.gitignore

Revert "Remove Composer's file and directory."

Remove .glide/ ignore

Ignore Visual Studio 2017 C++ app generated files.

UnrealEngine - Include Plugins folder

Update comment

Update VisualStudio.gitignore

This reverts commit 5b836814.

Spelling

Update Terraform.gitignore

Fix link to go to current anchor

Improvements: 

 * `.terraform` directories could be created in any subdirectory when user runs `terraform init`.
 * Quite an interesting variations of`.tfstate` files are created by Terraform such as `.*.tfstate.d` or  `.*.tfstate.lock.info`. It's best not to name any file with `*.tfstate.*` pattern.
 * `*.tfvars` files often contain private data and not supposed to be committed.