wip

* moving passdb_slim out of main directory
* getting rid of some warning messages (should handle return values at a later time)
* added README.md, very much a wip but at least it's a starting point

busunit/README.md

@@ -0,0 +1,38 @@
+Driver Interface Unit
+===
+
+This is the main source directory for the Driver Interface Unit (DIU)
+and Passenger Interface Unit (PIU).
+
+The DIU is driver facing and manages fare collection, server communication,
+route change, driver login and PIU communication.
+The PIU manages reading magstripe media, RFID media and rider facing messages through
+it's display.
+
+Note that this document is a work in progress and is currently incomplete.
+
+Please check back for updates.
+
+Quick Start
+---
+
+To compile:
+
+```
+./build_all.sh native
+```
+
+Binaries will reside in `bin/native`.
+
+To do a test run, a server must be setup for the DIU to communicate to.
+For testing, a [test docker server]() can be setup.
+
+The DIU portion is meant to be used on hardware that has both a GPRS, GPS and PIU
+connected.
+
+To test on a system other than a Raspberry Pi, a test environment has to be setup.
+To test on the Raspberry Pi, the appropriate system needs to be setup and peripherals
+attached.
+
+Please check back later for more details.
+