Add note about path precedence.  Perhaps this is what tripped up peter1000 here:

https://github.com/timthelion/subuser/issues/19
Revert "Set TERM variable as per the advice of peter1000"

This reverts commit 81a50509d8c1c364736a0887851bb12f9445e917.

REASON: These environment variables lasted longer than the instalation process and affected the colloring in vim.
Set the TERM variable temporarilly at install time