Merge tag '1.4.2' into develop

Released v1.4.2
New: initial composer file
New: ability to list the additional config files that are available to load
Fix: Undefined variable in BaseObject
Initial commit of download function is working
New: Log::getLevelFromName() and Log::getMaskForMinLevel()
File downloaded using fread. If it's a zip file, it's automatically extracted

Move to using OO finfo interface
DownloadLib and FileLib added
Update package to be FileLib not DownloadLib

Remove old DownloadLib exception

Test exceptions being thrown etc
Standard functions now throw the correct exceptions
\DownloadLib\Exception.php -> DownloadLibException.php
Merge pull request #6 from datasift/feature/DownloadLib

Feature/download lib
Version bump
Merge branch 'release/1.5.0'