Injection into C++

[StaticRocket]

Removes Arduino grammar option and instead injects features into the C++ grammar.

The C++ grammar package is already set to recognize the ".ino" file type and has nice snippets that span between C++ and Arduino C, but language-arduino (in my opinion) has superior syntax highlighting and Arduino specific snippets. This PR makes it so the snippets and syntax highlighting rules in this package are injected into the C++ grammar allowing users to access both snippets without having to redefine them in the scope of this package or change grammar settings on their end.

Closes #19

[StaticRocket]

It's been a while @szechyjs, what do you think?

[SConaway]

Hello?