Merge pull request #151 from gullitmiranda/master

Fixing bug that does not allow two systems with sames rules to be loaded into the same `Azkfile.js`, fix #46
Fixing Makefile to create node_modules/.install
Upgrading changelog and up version to 0.7.0
Creating functional test to check two systems with sames rules #151
Fixing slow generators #158
Upgrading changelog and up version to 0.7.1-dev
Fixed postgres and mysql exported envs #161
Fixing default mount folder on subfolders systems #165
Changing CHANGELOG for #151 #158 #161 #165
Better message when `azk` find systems with `azk init`
Improving Python generators #159
- Djangos rule choose correctly python version.
- SimpleHttpServers systems support
Fixing subfolders path mount #168
Fixing mounts when systems repeates #173
Adding generators for `php`, `php with composer` and `php with laravel`, fix #152
Adding instructions to run `azk tests` with `--grep` in `README.md`