Options with spaces not be posted to slack

[purduemike]

If a user inputs an option with a space in it, no message is sent to slack. It looks like passing options cannot handle spaces.

Example:

option: -purpose
option value: this is my option value

The above option value will cause the slack webhook plugin to fail.

[bdwyertech]

This probably ties into #19 I'd bet that once the option has spaces, RunDeck's output value for executionData.argstring encloses the string with spaces in double quotes.

[bdwyertech]

Hopefully addressed by #20