Minor improvement

Just a minor improvement to prevent strings not behind right format when catching it.

Add cache command

Added cache command php artisan languagecenter:cache.

Caching

This version of Laravel Language Center does not including breaking changes.
It however just includes some new features which adds cache.

This will also make less requests to LanguageCenter. Currently for each request to a site using Laravel LanguageCenter package, then it would make an API call to LanguageCenter.
Now it will only make it once a while, and if LanguageCenter fails, it will NOT break no longer.

First release

This is a first release