updating jshintrc and jshintignore

[pdehaan]

partial fix for https://bugzilla.mozilla.org/show_bug.cgi?id=1043085

[pdehaan]

We still have a few errors, and i'm not sure how to proceed:

$ make lint
content/js/webapp.js: line 26, col 7, 'router' is defined but never used.
content/js/webapp.js: line 85, col 7, 'ConversationHeader' is defined but never used.
content/js/webapp.js: line 120, col 7, 'ConversationFooter' is defined but never used.
content/js/webapp.js: line 88, col 11, 'conversationUrl' is defined but never used.
content/js/webapp.js: line 90, col 11, 'urlCreationDateClasses' is defined but never used.
content/js/webapp.js: line 97, col 11, 'callUrlCreationDateString' is defined but never used.
content/js/webapp.js: line 224, col 11, 'tosHTML' is defined but never used.
content/js/webapp.js: line 231, col 11, 'btnClassStartCall' is defined but never used.
content/js/webapp.js: line 234, col 11, 'dropdownMenuClasses' is defined but never used.

content/shared/js/views.js: line 466, col 33, Expected '===' and instead saw '=='.
content/shared/js/views.js: line 468, col 22, Expected '===' and instead saw '=='.

content/shared/js/websocket.js: line 46, col 4, Unnecessary semicolon.
content/shared/js/websocket.js: line 58, col 25, 'Promise' is not defined.

test/shared/views_test.js: line 17, col 7, 'getReactElementByClass' is defined but never used.

test/standalone/standalone_client_test.js: line 97, col 9, Missing semicolon.
test/standalone/standalone_client_test.js: line 44, col 19, 'fakeServerErrorDescription' is defined but never used.
test/standalone/standalone_client_test.js: line 5, col 1, 'hawk' is defined but never used.

test/standalone/webapp_test.js: line 145, col 29, 'Promise' is not defined.
test/standalone/webapp_test.js: line 187, col 29, 'Promise' is not defined.
test/standalone/webapp_test.js: line 205, col 13, 'done' is not defined.
test/standalone/webapp_test.js: line 512, col 11, 'requestCallUrlInfo' is defined but never used.
test/standalone/webapp_test.js: line 607, col 31, 'StandaloneClient' is defined but never used.

22 errors
make: *** [lint] Error 2

I don't know what a "/shared/" directory is. Is that something we can edit, or should I add those paths to the .jshintignore.

[Standard8]

Sorry, we never got to this when it was originally proposed. We're just landing eslint integration in https://bugzilla.mozilla.org/show_bug.cgi?id=999737 so we'll be able to start fixing some of these if they are still an issue.