Dataset process creation

src/api/process.js

src/components/Corpus/Datasets/Row.vue

src/components/Corpus/Datasets/StateTag.vue

src/components/HeaderActions.vue

src/components/Process/Datasets/AddForm.vue

src/components/Process/Datasets/Row.vue

src/components/Process/Row.vue

src/router/index.js

src/store/corpora.js

src/store/process.js

src/views/Process/Configure.vue

src/views/Process/Datasets.vue

src/views/Process/Filter.vue

tests/unit/store/corpora.spec.js

tests/unit/store/process.spec.js