Review name argument vs meta name overload

[dromer]

Early on in the meta.json I added a method to be able to set the name via the json file, however this also causes a bit of inconsistencies and possibly confusion.

We should review if this overload really makes sense or just stick to the regular method of supplying the project name (used internally for symbols etc.)

For DPF we may want to add a new optional "prettyname" which is used for presenting in DISTRHO_PLUGIN_NAME and is allowed to have spaces and other "pretty" formatting.