Fixed make/firmware-defs.mk to use PYTHON env variable

It caused build errors on systems where python points to python3.

Signed-off-by: Francesco Nero <nerofrancesco@hotmail.com>
Removed tools entries that are duplicated in tools.mk
Added missing Windows path export
GCS:Telemetry Schedular, create a fill with value dialog
Removed redefinition of PYTHON var in makefiles

Also fixed some typos in some makefiles.

Signed-off-by: Francesco Nero <nerofrancesco@hotmail.com>
GCS:Telemetry schedular add space after comma
GCS:Telemetry scheduler -prevent user from inputing invalid values.
Merge pull request #1143 from guilhermito/schedular_helper

GCS Telemetry Scheduler: create a fill with value dialog
Merge pull request #1139 from jan76/tools1

Removed tools entries that are duplicated in tools.mk
LTM:
fix 2400 bauds bottleneck
fix makefiles
fix missing missing pios_com_lighttelemetry_id on quanton board.
switched to tab indent
reorganized code to proper formatting guidelines.
use roundf instead of round
Merge pull request #1142 from KipK/next

Some LTM fixes.
Merge pull request #1129 from francesconero/next

Fixed make/firmware-defs.mk to use PYTHON env variable
Merge branch 'next' of https://github.com/TauLabs/TauLabs into next