Warns if using --edit without editor
Warns if using --edit without editor

Closes #151

Shir0kamii/jrnl,zdravi/jrnl,maebert/jrnl,nikvdp/jrnl,notbalanced/jrnl,beni55/jrnl,flight16/jrnl,philipsd6/jrnl,rzyns/jrnl,cloudrave/jrnl-todos,MinchinWeb/jrnl,MSylvia/jrnl,dzeban/jrnl