Updated configuration file processing:

* Options override all configuration file settings
* In absence of configuration file settings or option settings,
  defaults are used
* Added new global settings: Port, Bind, Wait, WaitTime, Debug
* Added more documentation to LCDd.conf

server/main.h

@@ -29,5 +29,6 @@ typedef struct screen_size {
 #define DEFAULT_SCREEN_PRIORITY 128
 #define DEFAULT_SCREEN_DURATION 32
 #define DEFAULT_HEARTBEAT 1
+#define DEFAULT_ADDR "127.0.0.1"
 
 #endif