Changelog

0.8.0

`nsi-core`

Context::render_control() now takes nsi::Action as fist parameter. This change was made to reflect the fact that the action cannot be omitted. The 2nd parameter is the familiar Option<&ArgSlice>.

I.e. this:
```
ctx.render_control(&[nsi::string!("action", "start")]);
```
changes to:
```
ctx.render_control(nsi::Action::Start, None);
```
All Arg types now implement Clone.
Pointer & Pointers have been deprecated. You should be able to do everything via Reference & Refererences.
The following types are now Send & Sync:
- Callbacks with static lifetimes (Callback<'static>).
- References with static lifetimes (Reference<'static>).
- Strings

0.7.0

`nsi-core`

Context is now Send, Sync, Copy & Clone.
All Context methods that have optional arguments now take Option<&ArgSlice> (instead of &ArgSlice).

I.e. this:
```
let ctx = nsi::Context::new(&[]).unwrap();
```
changes to:
```
let ctx = nsi::Context::new(None).unwrap();
```