Use tagged source code from repo; fix invalid platform IDs

[ivankravets]

Requested in https://community.platformio.org/t/library-registry-points-to-an-outdated-fork/144

[ivankravets]

@gioblu I see that your library is popular in PlatformIO Registry and users report that we don't update it.

1. Please don't remove version field from the manifest. We are working on PlatformIO 3.0 and powerful Library Manager. The semantic version is important for the valid dependencies.
2. We would be grateful if you update version field with the valid repo tag as you do it for library.properties. Here is detailed explanation how PlatformIO Crawler handles version field.
3. Currently, we have an issue with platform field and only PlatformIO platform IDs are supported.

Please sorry for inconveniences, we are working on improvements for the whole PlatformIO ecosystem.

[gioblu]

Ciao @ivankravets, I am sorry to have temporarily created some issues to the PlatformIO users. Thank you so much for your fix. I am now taking a closer look thanks to your links. I think PlatformIO platform is really amazing piece of work in terms of Systems Engineering and Integration, compliments again.

[ivankravets]

@gioblu Thanks a lot for the warm words! The library has been updated http://platformio.org/lib/show/245/PJON