Bundle frameworks and fix dynamic library paths to allow distribution

- Also updated readme and removed unused sfml-network dependency
- Remove redundant inclusion of /opt/local library search paths, as my Boost is in /usr/local and trying to compile against the MacPorts version doesn't work for some reason
- Use absolute paths instead of relative paths for linked frameworks and libraries in the project structure
- Don't try to link SFML.framework as it only contains headers, not libraries
- Add freetype to the project (was always a dependency, just more explicit now)

osx/fix_dylibs.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+#  fix_dylibs.sh
+#  BoE
+#
+#  Created by Celtic Minstrel on 14-04-17.
+#
+
+echo Fixing boost dylib install names...
+
+EXEPATH=@executable_path/../Frameworks
+BOEPATH="$BUILT_PRODUCTS_DIR/$EXECUTABLE_PATH"
+BFSPATH="$BUILT_PRODUCTS_DIR/$FRAMEWORKS_FOLDER_PATH/libboost_filesystem.dylib"
+
+# Update references in the executable file
+install_name_tool -change libboost_system.dylib "$EXEPATH/libboost_system.dylib" "$BOEPATH"
+install_name_tool -change libboost_filesystem.dylib "$EXEPATH/libboost_filesystem.dylib" "$BOEPATH"
+
+# Update references within Boost
+install_name_tool -change libboost_system.dylib "$EXEPATH/libboost_system.dylib" "$BFSPATH"
+