Add tasks, add solutions

package-lock.json

package.json

src/actions/homework.js

src/actions/types.js

src/components/forms/AddSolutionForm.js

src/components/forms/AddTaskForm.js

src/components/pages/Homework.js

src/index.js

src/reducers/AddSolutionReducer.js

src/reducers/AddTaskReducer.js

src/reducers/HomeworksReducer.js

src/reducers/index.js