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.