Autoupdates render platform unbuildable with latest published version

[iterati]

I did not realize that the default settings for platformio were to auto-update libraries and platforms and after a number of successful builds, an update happened that broke my build. The fix involved removing the platformio distribution I downloaded from the site, grabbing the source from github, and building/installing from the source.

I believe the problem was that updates to the teensy platform libraries were not compatible with the 1.3.0 build. Even after multiple attempts, platformio upgrade would return that it was at the most up to date version.

Here's the error my build would throw on 1.3.0:
.pioenvs/autogen_teensy31/libFrameworkArduino.a(mk20dx128.o): In function ResetHandler':
.../.pioenvs/autogen_teensy31/FrameworkArduino/mk20dx128.c:764: undefined reference to __rtc_localtime'

The project again builds successfully on 1.4.0.dev2. I recommend turning off the platform and library auto-updates by default.

[ivankravets]

Thanks a lot! Autoupdates will be disabled in PlatformIO 2.0. See my latest commit b52ff11.

[iterati]

Awesome. Thanks for your attention on this and your work on this project. It's really streamlined my development workflow.