Bump version to 0.5.1

Base32.xcodeproj/Base32_Info.plist

@@ -14,7 +14,7 @@
   <key>CFBundlePackageType</key>
   <string>FMWK</string>
   <key>CFBundleShortVersionString</key>
-  <string>0.5.0</string>
+  <string>0.5.1</string>
   <key>CFBundleSignature</key>
   <string>????</string>
   <key>CFBundleVersion</key>