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fix #40 - improve here-doc strings
add script to build package as dir
add tests for here-doc strings (syntax)

Requirements to run tests:

- UnitTesting (install via Package Control)
- Publish the package as directory (./bin/Build-Folder.ps1)

Running the tests:

- Open Command Palette
- Select 'UnitTesting'
- Type in 'PowerShell'
- Press enter
edit readme
Merge pull request #44 from my-personal-forks/fix-40-here-string

Fix #40 - here string