Export bigdecimal.h properly.

bigdecimal.xcodeproj/project.pbxproj

@@ -7,7 +7,7 @@
 	objects = {
 
 /* Begin PBXBuildFile section */
-		CD2EC1BC1F0AF2C300D49DF5 /* bigdecimal.h in Headers */ = {isa = PBXBuildFile; fileRef = CD2EC1BB1F0AF2C300D49DF5 /* bigdecimal.h */; };
+		CD2EC1BC1F0AF2C300D49DF5 /* bigdecimal.h in Headers */ = {isa = PBXBuildFile; fileRef = CD2EC1BB1F0AF2C300D49DF5 /* bigdecimal.h */; settings = {ATTRIBUTES = (Public, ); }; };
 		CD2EC1BF1F0AF3B800D49DF5 /* bigdecimal.cpp in Sources */ = {isa = PBXBuildFile; fileRef = CD2EC1BE1F0AF3B800D49DF5 /* bigdecimal.cpp */; };
 		CD2EC1C21F0BCCA700D49DF5 /* bignum_helper.h in Headers */ = {isa = PBXBuildFile; fileRef = CD2EC1C11F0BCCA700D49DF5 /* bignum_helper.h */; settings = {ATTRIBUTES = (Private, ); }; };
 		CD2EC1C51F0BCCBF00D49DF5 /* bignum_helper.cpp in Sources */ = {isa = PBXBuildFile; fileRef = CD2EC1C41F0BCCBF00D49DF5 /* bignum_helper.cpp */; };