Added sendmail path config option.
Updated available drivers for mail.
New welcome page.
Merge pull request #2018 from laravel/welcome-page

New welcome page.
Just boot MbString on Patchwork.
Fix casing.
The default sendmail path must contain '-bs' or '-t' flags.

Signed-off-by: Isern Palaus <ipalaus@ipalaus.es>
Merge pull request #2021 from ipalaus/fix/sendmail-config

The default sendmail path must contain '-bs' or '-t' flags.
Make artisan executable
Merge pull request #2027 from nils-werner/executable

Make artisan executable
Merge pull request #4 from laravel/develop

Develop