Change hashbang to python2.

The code does not work with Python 3.
Fix flash_begin to send the right number of blocks.

Update docs about this and the status flag. Also add opcode 0x0b.
Add setup.py
Merge pull request #7 from tommie/master

Force python2 and fix flash_finish problems
Merge branch 'add-setup' of git://github.com/george-hopkins/esptool into george-hopkins-add-setup
setup.py: we're not supporting python3 yet
Merge branch 'george-hopkins-add-setup'
changed shebang line as python2 does not work on MacOS
support other baud rates
use modem status lines to control CH_PD and GPIO0
updated readme