Simplified and refactored version
This release simplifies dockerpresso:
- no other dependencies than bash
- dockerpresso is supposed to be installed in /usr/local/bin or similar place instead of in each project
- no separate templates files, everything is in one bash script
- no custom docker images or installers, I know I already wrote that, but this is just a single bash script now
- commands simplified and reworked for easier usage
- documentation slightly updated