Support custom modules inclusion

Allow to choose which modules are compiled with raylib, if some modules are excluded from compilation, required functionality is not available but smaller builds are possible.

src/raylib.h

@@ -1031,7 +1031,7 @@ RLAPI void SetLoadFileTextCallback(LoadFileTextCallback callback); // Set custom
 RLAPI void SetSaveFileTextCallback(SaveFileTextCallback callback); // Set custom file text data saver
 
 // Files management functions
-RLAPI unsigned char *LoadFileData(const char *fileName, unsigned int *bytesRead);     // Load file data as byte array (read)
+RLAPI unsigned char *LoadFileData(const char *fileName, unsigned int *bytesRead); // Load file data as byte array (read)
 RLAPI void UnloadFileData(unsigned char *data);                   // Unload file data allocated by LoadFileData()
 RLAPI bool SaveFileData(const char *fileName, void *data, unsigned int bytesToWrite); // Save data to file from byte array (write), returns true on success
 RLAPI char *LoadFileText(const char *fileName);                   // Load text data from file (read), returns a '\0' terminated string
@@ -1039,7 +1039,7 @@ RLAPI void UnloadFileText(char *text);                            // Unload file
 RLAPI bool SaveFileText(const char *fileName, char *text);        // Save text data to file (write), string must be '\0' terminated, returns true on success
 RLAPI bool FileExists(const char *fileName);                      // Check if file exists
 RLAPI bool DirectoryExists(const char *dirPath);                  // Check if a directory path exists
-RLAPI bool IsFileExtension(const char *fileName, const char *ext);// Check file extension (including point: .png, .wav)
+RLAPI bool IsFileExtension(const char *fileName, const char *ext); // Check file extension (including point: .png, .wav)
 RLAPI const char *GetFileExtension(const char *fileName);         // Get pointer to extension for a filename string (includes dot: '.png')
 RLAPI const char *GetFileName(const char *filePath);              // Get pointer to filename for a path string
 RLAPI const char *GetFileNameWithoutExt(const char *filePath);    // Get filename string without extension (uses static string)