REFACTOR: Expanded many parameter names for functions.

DOCS: Corrected comments to match new parameters.
CHORE: Moved some variable definition to top of function call.

include/image/transformations.h

@@ -38,6 +38,6 @@ u32_flip(const unsigned int* buf, const int width, const int height);
  * new buffer fails to create and is invalid
  * */
 unsigned int*
-u32_rotate(const unsigned int* buf, PPM* m_img);
+u32_rotate(const unsigned int* buf, PPM* metadata);
 
 #endif