Revscoring

Changed
- Updated revscoring utility to list `model_info` and tune utilities.
- Added error handling to cross-validation.
- Updated README w/ badges and source highlighting.

Fixed
- Removed `import_from_path` issue in `extract_features` utility.
- Fixed test for sklearn classifier.

Fixed
- Minor fix in Bernoulli spelling.
- Fixed minor issue in svc params config.
- Minor fixes to tuning.

Changed
- Switched tuning utility to use multiprocessing directly.
- Cleanup to tuning utility and add config files for each classifier's param space.

Removed
- Removed old config ptwiki config files that were never used.

Added
- Added estonian and ukrainian languages

Changed
- Switches to aspell packages for et and uk in travis
- Replaces duplicate myspell-de-ch with myspell-de-de in README.rst

Fixed
- TravisCI errors

Fixed
- Fixed binary operators.

Changed
- Added `and/or/not` operators to features

Fixed
- Fixes enchant link in README.rst

Added
- Adds `--test-prop` param to `train_test` utility.
- Adds a Dockerfile for building an image that will run an ipython notebook to build a revscoring project.
- Adds a `trim()` function for reducing a `feature_list` to it's basic 'features' -- a prerequisite for wikimedia/ores100
- Adds basic language features for Dutch, German and Italian.

Changed
- Widens version requirements for scipy and numpy to make compiling dependencies from source less common.
- Substantial improvements to documentation. Now using 'alabaster' theme and simplified examples.