move to binary esptool. Run get.py/get.exe to get it!

With this step we remove all dependencies, but git. Mac and Linux come
with Python by default, so they will keep using get.py to update the
toolchain and support binaries. Windows users have an "All point and
click" installation option that requires only git and Arduino to be
downloaded.
Fingers crossed :)

Author: me-no-dev

README.md

@@ -30,9 +30,6 @@ Most of the framework is implemented. Most noticable is the missing analogWrite.
 - Open Terminal and execute the following command (copy->paste and hit enter):
 
   ```bash
-  curl -o get-pip.py https://bootstrap.pypa.io/get-pip.py && \
-  sudo python get-pip.py && \
-  sudo pip install pyserial && \
   mkdir -p ~/Documents/Arduino/hardware/espressif && \
   cd ~/Documents/Arduino/hardware/espressif && \
   git clone https://github.com/espressif/arduino-esp32.git esp32 && \
@@ -48,9 +45,6 @@ Most of the framework is implemented. Most noticable is the missing analogWrite.
   ```bash
   sudo usermod -a -G dialout $USER && \
   sudo apt-get install git && \
-  wget https://bootstrap.pypa.io/get-pip.py && \
-  sudo python get-pip.py && \
-  sudo pip install pyserial && \
   mkdir -p ~/Arduino/hardware/espressif && \
   cd ~/Arduino/hardware/espressif && \
   git clone https://github.com/espressif/arduino-esp32.git esp32 && \