Fix typo.
Merge pull request #21 from knalli/patch-1

Fix typo.
feat(translateProvider): add a preferredLanguage property

Add the "preferredLanguage" property in order to solve an initial language
setting issue. At the configuration phase it's better to use this property
instead of the "uses" method, because if "rememberLanguage" is set to true
it may invoke a language file loading process twice (the language from the
uses method and a stored language).
chore(preferredLanguage): change demos

Change demo files in order to show a way of using the preferredLanguage
property.
test(preferredLanguage): add simple tests

Add simple tests for basic behavior of the preferredLanguage property.
Resolved conflict