added readme and license, fixed posix compiler warning

README.md

@@ -0,0 +1,22 @@
+wstationd
+=========
+`wstationd` is a simple daemon (written in C) for accepting Iridium Short Data
+Bursts via Direct IP. While it's intended to be used for collecting data from
+remote weather stations (thus the name), it can be used to collect information
+from any source operating over the Iridium SDB Service. `wstationd` has been
+tested on OSX, FreeBSD and Linux.
+
+
+Building
+--------
+Running `make` should be sufficient in most cases to compile `wstationd`.
+
+
+Running
+-------
+`wstationd` requires a single argument to specify the directory SDB will be
+collected into. Files will be created using a simple naming convention
+indicating the time it was collected and the IP it was collected from. Parsing
+these files is an exercise left up to the reader - the format will differ
+greatly based on your hardware. `wstationd` leaves all of the SDB headers
+intact, so you'll need to account for that when parsing. Good luck!