Set rest of environment up when changing versions

[dragan]

When changing global, local, or shell versions, we need to figure out a way to setup the rest of the environment as well.

export DYLD_LIBRARY_PATH=$MOPE_PREFIX/lib:$DYLD_LIBRARY_PATH
export LD_LIBRARY_PATH=$MOPE_PREFIX/lib:$LD_LIBRARY_PATH
export C_INCLUDE_PATH=$MOPE_PREFIX/include
export ACLOCAL_PATH=$MOPE_PREFIX/share/aclocal
export PKG_CONFIG_PATH=$MOPE_PREFIX/lib/pkgconfig