Documentation on how to attach data to pivot table

Polish translation

Hebrew Translation

Fixes #818, allows Query select to just be an Expression.

Eloquent docs update: eager loading using $includes example

Bulgarian translation

Ignore NULL values when determining whether a model object is dirty

Feature/eloquent update timestamp

Force UTF-8 charset on JSON responses

[Eloquent] Bug with eager loading relationships and isset()

Calling update() on an eloquent model has no way of overriding
the timestamp that should be set if $timestamps is set on the
model. This changes that so it uses the timestamp() function
which is an easy way to over ride the type of timestamps used.

Signed-off-by: Roumen Damianoff <roumen@dawebs.com>

Fixed and unified hebrew translation.

Signed-off-by: Jason Lewis <jason.lewis1991@gmail.com>

Hebrew language files.

Slightly re-organized and added some Session usage documentation

Signed-off-by: Tomasz Tomczyk <me@tomasztomczyk.com>

Fix a bug with Eloquent model classes and isset() when eager loading a relationship returns an empty result set.

Documentation typo

Updated Validation docs

Adding support for '=', in (:any) and (:any?) route patterns