Synchronize new packages from main repo

packages/blt

+type = plugin
+repository = https://github.com/devert/plugin-blt
+description = Acquia BLT (Build and Launch Tool) plugin for Oh My Fish

packages/emoji-powerline

+type = theme
+repository = https://github.com/wyqydsyq/emoji-powerline
+description = A fish theme based on Agnoster to throw in some emojis and more powerline-ness

packages/fish_logo

+type = plugin
+repository = https://github.com/HenrikWL/plugin-fish_logo
+description = A fish_logo function for the fish shell, creating the ASCII art fish

packages/gentoo

+type = theme
+repository = https://github.com/ribugent/theme-gentoo
+description = Unofficial Gentoo fish prompt theme