Initial pass at a JScript-based SAPI gateway

This would replace the VBS version if all works out, and has support for
additional parameters *and* works with the conflicting voice software.
Port the SAPI5 service implementation to JScript

Adds missing options, adjusts all calls, and fixes up the response
formats.
Change description of SAPI 5 service

This now says "JScript" to reflect the new glue script.
Consistent validation between JScript and Python

Fixes the volume range to be 1..100 on both sides, adding a note to see
the other when changing.
Remove old Visual Basic script for SAPI

I do not think there is anything left from this that needs retention.
Add sapi5.vbs to the clean-up script

This will keep user's installations clean.
Install and package script adjustments

Switches these to operate on JS files rather than VBS.
Update documentation for SAPI

Swaps in new screenshot and adds the new configuration options.
Merge branch 'bug/acapela-sapi-8' into develop

Brings in some improved SAPI functionality (including options for Speed
and Volume). Fixes #8 for Acapela.