Changing TinyOS variable names

| Old Variable        | Proposed Variable Name      | Default Value                    | Purpose                                                             |
|---------------------|-----------------------------|----------------------------------|---------------------------------------------------------------------|
| TOSROOT             | TINYOS_ROOT_DIR             | relative to application Makefile | Base for all other variable defaults                                |
| TOSDIR              | TINYOS_OS_DIR               | $TINYOS_ROOT_DIR/ tos            | Path to `/tos` folder containing main system source to compile with |
| TINYOS_MAKE_PATH    | TINYOS_MAKE_DIR             | $TINYOS_ROOT_DIR/ support/make   | Path to `/make` that contains the targets, extras, and rules        |
| MAKERULES           | TINYOS_MAKERULES            | $TINYOS_MAKE_DIR/ Makerules      | Path to main makefile                                               |
| TINYOS_MAKELOCAL    | TINYOS_MAKELOCAL            | $TINYOS_MAKE_DIR/ Makelocal      | Path to optional Makelocal file                                     |
| TINYOS_MAKEDEFAULTS | TINYOS_MAKEDEFAULTS         | $TINYOS_MAKE_DIR/ Makedefaults   | Path to Makedefaults                                                |
| TOSMAKE_PATH        | TINYOS_MAKE_ DIR_ADDITIONAL | unset                            | Space separated paths of additional `support/make` directories      |
Install imote2-ocd-program.py

No reason to have the makefile need to dig into tools in order to
install to the hardware.