Added Brazilian-Portuguese block translation

This version added the new block translation and updated the version of s2m to 2.1.

No changes from 1.13 - new release because of pypi issue

Pypi is having issues with release numbers so bumped to 2.0

Repaired explicitly selecting com port

Using the -p option when starting s2m did not function correctly.

Korean and Traditional Chinese (tw) translations added

Default text for Scroll block changed to 'Hello!'.

Fixes for issues 9 and 10

This release provides a fix for issue #9 and issue #10.

Performance and Other Changes

This release incorporates changes to:

1. The micro: bit script s2mb.py was changed to lower the sleep loop and some cleanup performed.
2. The Scratch Write Pixel block was changed to allow variables to be used with its parameters
3. Major changes to the polling architecture were made. These result in lower CPU utilization and better performance in reporting sensor changes.
4. When selecting Japanese using the s2m -l option, you may now specify ja or 1 as the option:
   s2m -l 1
   or
   s2m -l ja

Japanese blocks added.

Japanese block translations were added.

Fixes for running on Mac

This release is a fix for issue #1

By pass finding the scratch files path when starting with -c no_client

This change avoids looking for the path to the scratch files when starting with

s2m -c no_client

It does not affect anything if starting without the -c option.

Fixed a python 2 incompatiblity

A print statement needed to be updated for Python 2 compatibility.