Reorganise everything into modules
Improve payments and add season date settings

- Add season starts and season ends in settings fields
- Generate payments months according to settings
- Don’t show members that were inactive during whole season on payments
document
- Reposition alert messages
- Fix bugs from previous commit
Move Auth to modules
Merge pull request #68 from pajcho/feature-modules

Feature modules
Merge pull request #69 from pajcho/development

Development