Open source features for community

[cyborgshead]

• [x] Update .gitignore
• [x] Add .editorconfig
• [ ] Update LICENSE
• [ ] Setup project description
• [ ] Update README (+ setup, FAQ, wiki, dockerhub)
• [x] Describe Semantic Versioning of cyber-markets
• [x] Setup CHANGELOG
• [x] CI bages
• [x] Add current version bage (and other bages)
• [x] Describe Code Style
• [x] Add CONTRIBUTING
• [ ] Add CONTRIBUTORS
• [ ] Add ISSUE_TEMPLATE
• [ ] Add PULL_REQUEST_TEMPLATE
• [ ] Organize labels
• [ ] Describe labels
• [x] Describe GitFlow (branches and issues)
• [ ] Describe cyber•Search board on organization level (milestones flow)
• [ ] Add CSIP (cyber-search improvement proposal)
• [ ] Describe CSIP (cyber-search improvement proposal)

[cyborgshead]

actual now again PS: add zenhub badges too

[hleb-albau]

@litvintech Update LICENSE so, we will keep MIT or move to WTFPL?

[hleb-albau]

@litvintech @21xhipster

1. [Organize labels] [Describe labels] points should be done on ORG level and managed by utils to update on all repos at once. What do you think?
2. License WTPFL or MIT?
3. I think, its is too early for introducing CSIP
4. Describe cyber•Search board on organization level (milestones flow). What and where should be described?