Improve searching for plugins.
Improve searching for plugins.

Among other things, this fixes the "mysterious error" in finding plugins
if you are using a windows snapshot without having the exe and plugins
in a "bin" directory.

Thought I had filed a bug on this, but apparently it just bugged me.

godbyk/OSVR-Core,godbyk/OSVR-Core,OSVR/OSVR-Core,OSVR/OSVR-Core,feilen/OSVR-Core,leemichaelRazer/OSVR-Core,feilen/OSVR-Core,leemichaelRazer/OSVR-Core,godbyk/OSVR-Core,leemichaelRazer/OSVR-Core,feilen/OSVR-Core,OSVR/OSVR-Core,leemichaelRazer/OSVR-Core,godbyk/OSVR-Core,godbyk/OSVR-Core,feilen/OSVR-Core,OSVR/OSVR-Core,OSVR/OSVR-Core,godbyk/OSVR-Core,leemichaelRazer/OSVR-Core,feilen/OSVR-Core,OSVR/OSVR-Core