Added plugin cleanup mechanism
Added call to Push_Nth_Plugin
Added implementation for Push_Nth_Plugin
Removed operation_keyword from structure
Changed nth_plugin
Added prototype for Dispatch_Nth_Operation
Added definition for Dispatch_Nth_Operation
Corrected call to Dispatch_Nth_Operation
Added keyword check
Adding -rpath
Added missing call to free
No longer checking for error in call to Unlink_Nth_Plugins
Added prototypes for callbacks
Added check for argument availability
Added check for operation keyword
Deleted operands structure
Added operand retrieval mechanism