fix(commit): does not try to escape backticks on Windows

fixes previous commit, which should only have applied to *nix

Closes commitizen#105

fix(commit): allow backticks in commit message

Escapes backticks before passing the commit message to Git.

Closes commitizen#105

fix(commit): allow quotes in commit message

Fixes an issue in which quotes in the description were not escaped and would cause cz to fail.

fix(lib): keep newline at the end of package.json

fixes commitizen#159

fix(lib): Expose commitizen as a library

This fixes index.js so that it exposes commitizen as a library.

Closes commitizen#80

fix(cache): use lodash assign for better node 0.12 support

Previously we used Object.assign, but for better node 0.12 support we can use _.assign. This also
fixes a small wording change in some tests.

Fixes commitizen#132

feat(commit): add --retry option

This adds an option to git cz --retry the latest commit. This is useful if you go through the
prompts but your tests fail.

Closes commitizen#132

fix(commit): fix commit to allow --verbose flag

verbose was broken due to needing two dashes. This is a hotfix for specifically this command. We may
need some further fixes for options to be added.

Closes commitizen#103

fix(testing): update babel and code coverage

This change updates us to babel 6 for compilation and nyc instead of istanbul for code coverage. We
also updated blob to the latest version.

Closes commitizen#156 Closes commitizen#140 Closes commitizen#106 Closes commitizen#51

Merge pull request commitizen#154 from marionebl/fix/gulp-production-…

…dependency

fix(dependencies): make gulp depedencies available for prod installs