fix: use main lodash instead of lodash.throttle to make webpack bundles smaller

[jedwards1211]

fix #55

I also added babel-plugin-lodash so that there's low risk of anyone importing additional lodash methods in an inefficient way in the future. But if you want me to remove this and just use import throttle from 'lodash/throttle' instead, let me know.

[coveralls]

Coverage remained the same at 96.907% when pulling c8fd33fcb54ccfac30725d16d8cb233f6909e95c on jedwards1211:main-lodash into f4724fb63263b3e026675ff5f5b69b8c57d13036 on fkhadra:master.