Merge pull request #102 from bxparks/develop

merge 1.7.1 into master

Merge pull request #94 from bxparks/develop

merge 1.7.0 into master

Merge pull request #86 from bxparks/develop

merge v1.6.1 into master

Merge pull request #78 from bxparks/develop

merge v1.6.0 into master

Merge pull request #74 from bxparks/develop

merge 1.5.5 into master

Merge pull request #71 from bxparks/develop

merge v1.5.4 into master

Merge pull request #70 from bxparks/develop

merge v1.5.3 into master

Merge pull request #68 from bxparks/develop

merge v1.5.1 into master

Merge pull request #67 from bxparks/develop

v1.5 - support STM32duino, support F() for ESP8266, blacklist megaAVR

Merge pull request #62 from bxparks/develop

merge v1.4.1 into master