various small tweaks

Worked on a libpd project with rjlib and make some small tweaks/updates here and there.

* removed executable flag for patches that were set as executable (probably coming from Windows)
* added [u_makepoloymono], now no throw/catch errors with mono synths
* cleaned [u_loadmeter] gop by setting send/receives on nbox to hide inlet/outlets
* added nbox to[u_loadmeter] ouput in [u_loadmeter-help]
* added a basic gitignore