add rudimentary location support

The function dbfp_query_location_name performs the location.name query
and returns a list of all stations that match the search term.  The
implementation has two flaws:  there is no URL encoding, and
malformatted query results will not lead to a meaningful error message.

There are two new test cases:  basic tests some basic functionality, as
setting the API key and accessing the API.  location adds a simple test
for the location.name query.

1 files changed, 6 insertions, 0 deletions

diff --git a/README b/README
index ef0ee05..6e0d563 100644
--- a/README
+++ b/README
@@ -5,6 +5,12 @@ This C library provides an interface to the timetable API of the Deutsche Bahn
 (*Fahrplan-API*).  This API exposes information on stations, departures,
 arrivals and routes.
 
+Dependencies
+------------
+
+ - libcurl
+ - libexpat
+
 Compiling and installation
 --------------------------