**API**

- Added the `populate_manifest_file` function

**Settings**

- Added the `HMR` setting, which toggles support for hot module replacement

- Added the `USE_MANIFEST`, `MANIFEST`, `MANIFEST_PATH`, and `MANIFEST_SETTINGS` settings, which provide

support for offline manifests

- Added the `POLL` setting, which toggles the behaviour of webpack's file watcher in non-OSX environments

- Added the `BUILD_URL` setting, which denotes a url to an endpoint exposing webpack-build

- Added the `CONFIG_DIRS` setting, which enables lookups for relative paths to config files

- Added the `CONTEXT` setting, which denotes the default context sent to config functions

- Added the `CACHE` and `CACHE_DIR` settings, which control webpack-build's persistent file cache

**API**

- `webpack.compiler.webpack` now accepts the signature `(config_file, [context], [settings], [manifest], [compiler])`

**Settings**

- `OUTPUT_DIR` now defaults to 'webpack_assets'

- `BUNDLE_URL` is now `STATIC_URL`

- `BUNDLE_ROOT` is now `STATIC_ROOT`

- `WATCH_SOURCE_FILES` is now `WATCH`

- `WATCH_DELAY` is now `AGGREGATE_TIMEOUT`

**Dependencies**

- Replaced the js-host dependency with webpack-build

**API**

- Removed the undocumented config file writer

**Settings**

- Removed the BUNDLE_DIR and CONFIG_DIR settings

- Removed the WATCH_CONFIG_FILES setting. In practice it proved to introduced memory leaks leading to

inevitable segmentation faults