Bugfixes and performance improvements

#100 Cherry-pick lodash methods to reduce package size @igorbt
#99 Misc Typos @azu
#98 Fixed bug where a JSON error returned from server wasn't parsed on the client side. @davidhouweling
#95 Fixed bug where config on server would always be undefined @escalona
#93 Misc typos @escalona
#92 Clarify the config option in service calls @escalona
#91 Accessing invalid fetchr urls will handle errors nicely instead of throwing uncaught errors