Code style

• No tabs or trailing whitespace are allowed.

• Indent blocks by 2 spaces.

• Class names should be camel case, starting with an uppercase.

• Class member variables should start with m_ or s_ for per-instance or class-static variables, respectively.

• Class methods should be camel case starting with a lowercase character (except acronyms which should be all-uppercase).

• Use shared pointers and a static create() method for classes that own significant storage or must be passed by reference to their superclass.