Source fix-ups: single l marshal, copyright, .travis.

core/c/mpw-marshal.c

@@ -21,7 +21,7 @@
 #include <string.h>
 #include <ctype.h>
 
-#include "mpw-marshall.h"
+#include "mpw-marshal.h"
 #include "mpw-util.h"
 #include "mpw-marshall-util.h"
 

core/c/mpw-marshal.h

@@ -26,11 +26,11 @@
 //// Types.
 
 typedef mpw_enum( unsigned int, MPMarshalFormat ) {
-    /** Generate a key for authentication. */
+    /** Do not marshal. */
             MPMarshalFormatNone,
-    /** Generate a key for authentication. */
+    /** Marshal using the line-based plain-text format. */
             MPMarshalFormatFlat,
-    /** Generate a name for identification. */
+    /** Marshal using the JSON structured format. */
             MPMarshalFormatJSON,
 
 #if MPW_JSON