Document list of strings without using JSON syntax

Help output for list of strings now looks like this:

REQUIRED PARAMETERS
       --alarm-names (list of string)
              A list of alarms to be deleted.

              Parameter Syntax

              Space separated values:

              "string" "string"
Merge branch 'release-0.4.2' into develop

* release-0.4.2:
  Bumping version to 0.4.2
Merge pull request #3 from jamesls/shorthand-example

Document list of strings without using JSON syntax
Bumping version to 0.4.3
Merge branch 'release-0.4.3'

* release-0.4.3:
  Bumping version to 0.4.3
  Document list of strings without using JSON syntax