Bumped version to 1.1.3.
Merge branch 'release/1.1.3' into develop

Version 1.1.3

Added:

Customizable highlight color for due dates. Closes Issue #13: More styling to due dates.

Fixed:

Font selector did not update the font displayed in the Preferences window when that font text box was focused (i.e., the first responder). Closes Issue #12: Font selector does not change the font.
Added option in user preferences for Esc key to undo all changes to text fields rather than to trigger autocompletion (the default behavior). Closes Issue #15: Pressing escape key after editing an entry does not revert the text.