Add AppVeyor CI test/build process - Fixes #16

[PlagueHO]

Bug Fixes

• Fixes #16 @pcgeek86: You will still need to set your encrypted API key in the AppVeyor.yml file here (on line 9):

environment:
  PowerShellGalleryApiKey:
    secure: <ToDo>

Improvements / Enhancements

• Adds initial unit tests, which currently only run PS Script Analyzer (PSSA).
• PSSA will fail build on errors, but PSSA Warnings will not cause to build to fail.
• PSSA Warnings will be shown in AppVeyor console for review:
• No other unit tests are included, but have added #Region for them to be placed.

Thanks!

[pcgeek86]

@PlagueHO Thanks for the PR! I left a couple comments, so when you have a chance, please have a look at them.

[PlagueHO]

I'll make the changes and recommit tomorrow! Thanks for reviewing :smile:

[pcgeek86]

@PlagueHO Thanks! If you'd like help with anything, we can always hop on Skype, too. pcgeek86 :smile:

[PlagueHO]

@pcgeek86 ! Cool - Good idea about skype too. I'll get it reinstalled. I've got an MS Exam in a couple of days so I'll be a bit quiet on the commit front but back after Thursday (NZDT).

I've made all the changes and also made some code layout changes to try and keep the line length to under 100 chars.

[pcgeek86]

Thanks @PlagueHO -- I'll merge this! Couple of questions though:

1. Can we completely avoid the use of global variables?
2. A lot of people dislike the backticks (line continuation character), although functionally, it's perfectly fine. Do you use PowerShell Splatting much? That is a nice work-around to using line continuation, and enforcing the use of named parameters.

[pcgeek86]

@PlagueHO Your code worked perfectly!!! Just ran a build and it's up to 0.13.1 now, thanks to your AppVeyor integration! Thanks so much for this contribution. :smile:

[PlagueHO]

Cool! :smile: A pleasure. I intend on getting some more commits in once I've caught up on some other issues I need to work through.

Cheers!