vsrepo is now no longer installed automatically for portable installs due to most plugins being available on pypi
the register-install command can now be used on *nix as well (HolyWu)
fixed ctrl-c handling in vspipe on non-windows systems
fixed an issue where certain compilers would occasionally compile the avx2 code path for some internal filters like maximum in a way that could produce pixels garbage along the edges
once again uses XDG_CONFIG_HOME environment variable for config location, was accidentally forgotten in r74
fixed issue where caches could be forgotten with frames still in them and leak memory
completely reworked cache limits so they are much stricter and the number of threads will now be dynamically lowered to avoid using too much memory
