Added "Build Tools" section

Proposed tools: SCons and PlatformIO
Added "Build Tools" section
Proposed tools: SCons and PlatformIO
Moved "buildout" to this new section
Added "Build Tools" section
Proposed tools: SCons and PlatformIO
Moved "buildout" to this new section
Merge pull request #29 from ivankravets/master

Added "Build Tools" section