get rid of params wrapper - directly access params via instance vars

[catmando]

instead of params.foo we should just say @foo

why?

1. its 25 times faster
2. its much more consistent - all component state is in instance vars regardless of how it is set
3. the params wrapper method is not private (but it should be)
4. less typing
5. it just feels more natural to ruby.

Don't worry - you can get the legacy behavior by adding param_accessor_style :legacy to any component (including the base component.) You can also say param_accessor_style :both to get both behaviors. If you need to switch back to the now standard behavior say param_accessor_style :hyperstack

So for example you can say param_accessor_style :legacy in your base component, and then as you update components to new style in that component say param_accessor_style :hyperstack.

The param declaration macro is unchanged, but has a new alias option.

param :foo, alias: :internal_name

If you like to distinguish between params and other instance variables you can use this feature like this:

param :foo, alias: :param_foo for example

see #52 for a complete example

[barriehadfield]

Update:

param :foo becomes @Foo
param :foo_bar becomes @FooBar

The CamelCase is used to highlight that the param is immutable.