[WIP] [feature] StructureBracesFixer

Braces for structure blocks, fix #98

- [x] add missing braces
- [x] correct single-level intend
- [ ] correct multi-level intend
- [ ] fix #168 
- [ ] `endif` ect tokens
- [ ] make Travis pass
nope. there is a third syntax:

```php
while (true):
    // some statements here
endwhile;
```