Refactors `travis.ps1`. Important for maintainers: I removed the webhook and badge stuff as neither exist anymore. I also merged the build and test phase with the bootstrap phase.
Added feature to classify experimental features in change log. Also fixed an issue with reporting all PRs with missing tags together.
## PR Context
Updates to the script which generates the change log.
Update 'Get-ChangeLog' to make it more accurate
Use "||" as the delimiter instead of "|", so it works for commit message that has the pipeline operator in it.
Handle merges that create a merge node in history.
Do not treat powershell team members as external contributors.
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
Create the module 'releaseTools.psm1' under 'tools' folder, which expose the function 'Get-ChangeLog' to generate a release change log based on the local commit history.
Reece Dunham