Tidy up .gitignore.

Change-Id: Iaab43f6e475d834644a5c18a983a24679874df52
Reviewed-on: http://gerrit.dmdirc.com/3913
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

Change-Id: I579afbde086d5761fe3743b23f4655cb4ea5b8df
Reviewed-on: http://gerrit.dmdirc.com/3909
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

Change-Id: Ib1cb137bf6d19be61c2329fb3dfb9939a347090a
Reviewed-on: http://gerrit.dmdirc.com/2500
Reviewed-by: Chris Smith <chris@dmdirc.com>
Automatic-Compile: DMDirc Build Manager

Change-Id: I7b5063eed32ec500899cd6cd8801821fde89c16a
Reviewed-on: http://gerrit.dmdirc.com/1668
Automatic-Compile: DMDirc Local Commits <dmdirc@googlemail.com>
Reviewed-by: Greg Holmes <greg@dmdirc.com>