Add common issues to read.me (#668)
Add common issues to read.me (#668)

* Add common issues to read.me

The issue that a POST is not working, seems to
came up very offten in the issue section.
Therefore this commit integrates that into the
readme.md

I also replaced `getLocalizedURL` with `localizeURL`
because its shorter, and I think most people
just want to pass the `url` anyway.

* Added not obvious duplicates of post-issue

* grammatically adjustments

mcamara/laravel-localization,grrnikos/laravel-localization