Add Getting Started Section for building the fcserver bianry

Fix line spacing

Add Getting Started Section to build the binary from source.

Instead of keeping track of one global time value, use multiple bounded low-frequency oscillators. This will keep working for an unlimited amount of time.

This was causing a compiler warning

https://code.google.com/p/nanoflann/

From nanoflann-1.1.7

Tested on MIPS OpenWRT router