update version to V1.7.0

update version to V1.7.0

update package_CubeCell_index.json

Merge pull request #248 from Max-Plastix/static-uart-buffer

Statically allocate UART Receive buffers

Merge pull request #220 from SebDominguez/master

Update Arduino.h

updated asr6601 boardInitMcu()

update AT to Rev1.3

update AT to Rev1.3

updated /platform.txt

update boards' name