tera 0.4.0

Jinja2/Django templates in pure Rust
Documentation
# Changelog

## 0.4.0 (2016/12/02)
- Add macros
- Add `filesizeformat` filter
- Add autoescape
- Add multiple level inheritance
- Add nested blocks
- Add `{{ super() }}`

Thanks to @SergioBenitez and @yonran for the help!


## 0.3.1 (2016/10/11)
- Fix regression when using variables in forloops + add test for it

## 0.3.0 (2016/10/11)

- Change signature of tests functions (BREAKING CHANGE)
- Add more tests: `undefined`, `odd`, `even`, `number` and `string`
- Add `include` directive to include another file
- Indexed array/tuple access using the `.x` where `x` is an integer

Thanks to @SergioBenitez and @andrelmartins for the contributions!


## 0.2.0 (2016/09/27)

- Added filters, see README for current list
- Added tests, only `defined` for now

Thanks to @SergioBenitez, @orhanbalci, @foophoof and @Peternator7 for the 
contribution!

## 0.1.3 (2016/08/14)
- Completely new parser
- Expose TeraError