The main purpose of this was to enable full symbols for windows release build.
Also makes explicit where we are optimizing and where we are not optimizing due to https://github.com/dotnet/corefx/issues/29700
Based on standard practices, we need to have a copyright and license notice at the top of each source file. Removed existing copyrights and updated/added copyright notices for .h, .cpp, .cs, .ps1, and .psm1 files.
Updated module manifests for consistency to have Author = "PowerShell" and Company = "Microsoft Corporation". Removed multiple line breaks.
Separate PR coming to update contribution document for new source files: #6140
Manually reviewed each change.
Fix#6073
The Linux release build was broken because AppImage,tar,tar-arm in build.json is turned into a string of "AppImage,tar,tar-arm" by docker run. Now it's changed to use switch parameters.
Create linux-arm tarball package in our release build.
Also moved the Linux-x64 tarball creation to Ubutntu 14.04, because Start-PSBuild adds additional symbolic link files when running on Red Hat Family distros.
Note that linux-arm can only be built on Ubuntu, so the tar-arm package will also be generated from the Ubuntu 14.04.
