Add some "Haxe only has expressions" code examples

[Gama11]

See 5f7cb09#commitcomment-11617946

[ncannasse]

Actually I feel that, while doing a great job at explaining the language spec, the Manual could be enriched with more examples.

Making sure that each concept is actually illustrated with some code examples would make sure that everything is actually well understood by the reader, as a double check.

Some people also prefer to read code that explanations, and only look at the spec if they want more details about how the code is working.

A few pages that I found could be examplified (or use more examples):

• http://haxe.org/manual/types-basic-types.html
• http://haxe.org/manual/types-overflow.html
• http://haxe.org/manual/types-enum-using.html
• http://haxe.org/manual/types-monomorph.html
• http://haxe.org/manual/types-dynamic.html

Maybe a complete review would be necessary

[Simn]

I cannot review my own text so you'll have to find someone else for that.

[Simn]

I don't really know what to do with this issue... so I'll just close it. We haxe code.haxe.org now for code examples.

[Gama11]

👍

There's actually one on this exact topic: http://code.haxe.org/category/principles/everything-is-an-expression.html