Add selected term tracking. Separate search into it's own component

...degree-planner/course-search/course-search.component.html

...degree-planner/course-search/course-search.component.scss

...p/degree-planner/course-search/course-search.component.ts

src/app/degree-planner/degree-planner.component.html

src/app/degree-planner/degree-planner.component.scss

src/app/degree-planner/degree-planner.component.ts

src/app/degree-planner/degree-planner.module.ts

src/app/degree-planner/store/actions/ui.actions.ts

src/app/degree-planner/store/effects/plan.effects.ts

src/app/degree-planner/store/reducer.ts

src/app/degree-planner/store/selectors.ts

src/app/degree-planner/store/state.ts

...gree-planner/term-container/term-container.component.html

...degree-planner/term-container/term-container.component.ts