Use case-insensitive compare when placing signs
Use case-insensitive compare when placing signs

Closes #262.
bonds/neomake,euclio/neomake,KariusDx/neomake,nerdrew/neomake,codeinabox/neomake,nerdrew/neomake,neomake/neomake,datanoise/neomake,neomake/neomake,euclio/neomake,bonds/neomake