refactor code to conform to C++ naming habits

[HerbertKoelman]

In prior releases I was using Java's naming rules. It's time to get back to C++ naming habits.

[HerbertKoelman]

• Use lower case for class and variable names.
• Private class data should use _ convention when needed
• Avoid the use of get_ something property value.
• ...

[HerbertKoelman]

Done