0.8.0 - data-model-optimization

[ch-greams]

• [x] https://github.com/ch-greams/recipe-book-app/issues/173 - https://github.com/ch-greams/recipe-book-app/pull/216
• [x] https://github.com/ch-greams/recipe-book-app/issues/218 - https://github.com/ch-greams/recipe-book-app/pull/223
• [x] https://github.com/ch-greams/recipe-book-app/issues/221 - https://github.com/ch-greams/recipe-book-app/pull/228
• [x] https://github.com/ch-greams/recipe-book-app/issues/139 - https://github.com/ch-greams/recipe-book-app/pull/227
• [x] https://github.com/ch-greams/recipe-book-app/issues/150 - https://github.com/ch-greams/recipe-book-app/pull/224
• [x] https://github.com/ch-greams/recipe-book-app/issues/138 - https://github.com/ch-greams/recipe-book-app/pull/229
• [x] https://github.com/ch-greams/recipe-book-app/issues/165 - https://github.com/ch-greams/recipe-book-app/pull/230
• [x] https://github.com/ch-greams/recipe-book-app/issues/225 - https://github.com/ch-greams/recipe-book-app/pull/227
• [x] https://github.com/ch-greams/recipe-book-app/issues/184 - https://github.com/ch-greams/recipe-book-app/pull/231
• [x] https://github.com/ch-greams/recipe-book-app/issues/185 - https://github.com/ch-greams/recipe-book-app/pull/232
• [x] https://github.com/ch-greams/recipe-book-app/issues/212 - https://github.com/ch-greams/recipe-book-app/pull/232
• [x] https://github.com/ch-greams/recipe-book-app/issues/219 - https://github.com/ch-greams/recipe-book-app/pull/233
• [x] https://github.com/ch-greams/recipe-book-app/issues/222 - https://github.com/ch-greams/recipe-book-app/pull/234
• [x] Bump version to 0.8.0