Remove duplicate merge_opens option in compile.py

The merge_opens option is available in the options received from the
command line and will apply to a Program instance and its tapes.

The merge_opens attribute is preserved on the Tape class as this allows
turning off merging (setting merge_opens to False) for specific tapes.

See #121 for more details.

Compiler/compilerLib.py

@@ -9,12 +9,11 @@ import time
 import sys
 
 
-def run(args, options, merge_opens=True,
-            reallocate=True, debug=False):
+def run(args, options, reallocate=True, debug=False):
     """ Compile a file and output a Program object.
     
-    If merge_opens is set to True, will attempt to merge any parallelisable open
-    instructions. """
+    If options.merge_opens is set to True, will attempt to merge any
+    parallelisable open instructions. """
     
     prog = Program(args, options)
     instructions.program = prog

compile.py

@@ -80,9 +80,7 @@ def main():
         print('Note that -O/--optimize-hard currently has no effect')
 
     def compilation():
-        prog = Compiler.run(args, options,
-                            merge_opens=options.merge_opens,
-                            debug=options.debug)
+        prog = Compiler.run(args, options, debug=options.debug)
         prog.write_bytes(options.outfile)
 
         if options.asmoutfile: