New MobiVM site

[obigu]

We are migrating the MobiVM site to GitHub pages to allow easier maintability and contributions from the community.

There are still some TODO:

• Review technical texts (requires @dkimitsa proof read)
• Migrate legacy RoboVM documentation based on GitBook
• Link to new plugins repository (S3?)

Keeping this issue open to keep track of the TODOs and add new ones if needed.

[dkimitsa]

hi @obigu
probably we should put brief tech notes on front page. Probably we might include tech sections of how it works long reads.
Here is a small draft for front page that should be adapted (spell checked) to meet the mood of page:

RoboVM translates Java bytecode into LLVM IR (intermediate representation) that later being compiled into native code for target platform. 
This approach allows to use widely available codebase from Java ecosystem at native platform speed. 
As it represents Java platform many JVM enabled languages might be used, such as Kotlin or DukeScript. 
Build in tree shaker effectively drops classes that are not used by code path that allows to keep binary footprint at minimal size