fixing markdown syntax

Board-Teensy-3.1-3.5-3.6.md

@@ -3,7 +3,7 @@ Cortex M4 based
 * [Teensy 3.5](http://www.pjrc.com/store/teensy35.html)
 * [Teensy 3.6](http://www.pjrc.com/store/teensy36.html)
 
-##Features##
+## Features
 ### Teensy 3.1
 * MK20DX256VLH7 72MHz
 * 256K Flash, 64kB RAM
@@ -38,7 +38,7 @@ Cortex M4 based
 * 2 DAC channels
 * SD card
 
-###Building###
+### Building
 To build, you can either use the ARM toolchain from [here](https://launchpad.net/gcc-arm-embedded) (add to your PATH), or you can use the ARM toolchain included with Arduino/Teensyduino (set ARDUINO environment variable to point to the root of your arduino/teensyduino tree).
 
 ```
@@ -56,7 +56,7 @@ You can flash using [teensy_loader_cli](https://github.com/PaulStoffregen/teensy
 ```
 make BOARD=TEENSY_3.6 deploy
 ```
-###Running Scripts
+### Running Scripts
 Currently, scripts must be compiled into the firmware image. Place your .py files into the teensy/scripts directory and they'll be built into your firmware image.
 
 The sample scripts directory includes a boot.py and main.py. The default main.py flashes the LED twice.