Add replace default build script

[aidangarske]

Description

Script to automate build procedure for replace default

[padelsbach]

General question: where will this script be used?

[aidangarske]

General question: where will this script be used?

I use this to build replace default locally; Added it so that potential customers / devs could test it out easier / build easier. This doesn't have to be merged its just an option and I found it useful when testing