Added a contentColor method.
Update MaterialDialog.java
Added a method to change content Color.

Added a contentColor method (similar to titleColor) that (obviously) changes the color of the builder.content TextView.
Added a contentColor and contentColorRes method.

Added a contentColor and contentColorRes method  (similar to titleColor) that (obviously) changes the color of the builder.content TextView.
Added a contentColor and contentColorRes method.

Added a contentColor and contentColorRes method  (similar to titleColor) that (obviously) changes the color of the builder.content TextView.
Merge pull request #76 from Phascinate/master

Added a contentColor and contentColorRes method.