Improve install flow and instructions

- Add some instructions for setting up the project
- improve the boostrap.sh
- add create_template_postgis.sh script
- fix problem with python module version removed from pip (rednose)
- add nodejs dependencies to the package.json file
- add script for running node 'binaries' from local instalation (node_modules) instead use them globally
- add Gemfile to handle ruby deps using bundler