v0.5.3

• Add 'slim' filetype support (same icon as 'html') (enhancement PR #98) (@lerrua)
• Add 'fish' filetype support (same icon as 'sh') (enhancement #93) (@michaelmrose)
• Updated old link references (enhancement PR #87) (@lerrua)
• Improved default Ruby icon (uses 'glyph set 2') (enhancement PR #97) (@lerrua)
• Prevent destorying user's conceal settings (Use setlocal) (enhancement PR #96) (@shawncplus)
• Fixes filenames of buffers getting lost in unite filter (fixes #86) (@ahrse)
• Various readme updates and fixes