Fixed README and updated version to 2.2.2

Author: rijnb

README.md

@@ -62,7 +62,7 @@ decode Mapcodes.
 
 # Release Notes
 
-* 2.2.2 (NOT RELEASED YET)
+* 2.2.2
 
     Removed minor warnings from CLion inspections.
 

mapcodelib/mapcoder.h

@@ -21,7 +21,7 @@
 extern "C" {
 #endif
 
-#define mapcode_cversion "2.2.1"
+#define mapcode_cversion "2.2.2"
 
 #define UWORD                               unsigned short int  // 2-byte unsigned integer.
 
@@ -365,4 +365,4 @@ const UWORD *encodeToAlphabet(const char *string, int alphabet);
 #ifdef __cplusplus
 }
 #endif
-#endif
+#endif

unitttest/README.md

@@ -2,7 +2,7 @@
 
 To build the unit tests, execute:
 
-  cd utility
+  cd unittest
   gcc -O unittest.c -o unittest
 
 (Or if you need to make sure there are no warnings:)