Added density value for conversion
Added license
Merge pull request #51 from ilsken/patch-1

Added license
Merge pull request #47 from felipenervo/master

Added density value for conversion
Use docker to test pull requests
release 1.4.0
Elaborate on performance, reference issue #46.
Add note about installing on RHEL/CentOS. (Issue #48)
Add note about pkgconfig on OS X (#26).
New option: srcFormat

Allow forcing input format in case it's not detected properly.

From @mvasilkov in #28.
Add flip support.
Improve exception handling for image.read.

Limit warning detection to ImageMagick warnings, since those are stated
to be "fine to ignore." Simplifies the code a bit.
Fix compilation warning on GCC.
Specify "transparent" as the color name where we want transparent.

Should fix #27.
Try async version of convert support sync if is
called without callback.
Merge remote-tracking branch 'refs/remotes/origin/master' into async
Backported master branch changes to async version.