Test integrated terminal

[weinand]

Test for #143:

• Windows - @weinand
• OS X - @joaomoreno
• Linux - @alexandrudima

Verify that the integrated terminal works as expected.

• List of known bugs
• List of feature requests

It should generally work out of the box, some setup information is available here #143 (comment)

Settings

Here are the available settings:

• integratedTerminal.ansiColors.* - Controls the colors of the terminal for supported terminals (bash, zsh, etc.)
• integratedTerminal.fontFamily - The font used in the terminal
• integratedTerminal.shell.unixLike - Shell to use on Mac/Linux ($SHELL is default)
• integratedTerminal.shell.windows - Shell to use on Windows (eg. "cmd.exe")

Example test cases

• Launching/exiting command line programs
• Using the git CLI
• Running build scripts/gulp tasks
• Tweaking settings
• Opening zsh in a bash terminal