support Octave language features different from MATLAB

[florianschanda]

• [ ] https://octave.org/doc/v5.2.0/Default-Arguments.html#Default-Arguments
• [ ] https://octave.org/doc/v5.2.0/Arithmetic-Ops.html#Arithmetic-Ops
• [ ] https://octave.org/doc/v5.2.0/Comparison-Ops.html#Comparison-Ops
• [ ] https://octave.org/doc/v5.2.0/Element_002dby_002delement-Boolean-Operators.html#Element_002dby_002delement-Boolean-Operators
• [ ] https://octave.org/doc/v5.2.0/Short_002dcircuit-Boolean-Operators.html#Short_002dcircuit-Boolean-Operators
• [ ] https://octave.org/doc/v5.2.0/Assignment-Ops.html#Assignment-Ops
• [ ] https://octave.org/doc/v5.2.0/Increment-Ops.html#Increment-Ops
• [ ] https://octave.org/doc/v5.2.0/Operator-Precedence.html#Operator-Precedence (just make sure its the same)
• [ ] https://octave.org/doc/v5.2.0/The-do_002duntil-Statement.html#The-do_002duntil-Statement
• [ ] https://octave.org/doc/v5.2.0/Looping-Over-Structure-Elements.html#Looping-Over-Structure-Elements
• [ ] https://octave.org/doc/v5.2.0/The-unwind_005fprotect-Statement.html#The-unwind_005fprotect-Statement
• [ ] https://octave.org/doc/v5.2.0/Continuation-Lines.html#Continuation-Lines
• [ ] https://octave.org/doc/v4.2.1/Numeric-Data-Types.html (underscores and different hex literals)

[florianschanda]

Actually, this (default parameters) appears to be an Octave feature.

[florianschanda]

Changed scope of issue to deal with all language features in Octave that are not in MATLAB