[Emacs] Remove unused code, reorganize file, add configuration
Removed the head variable for `org-confirm-babel-evaluate' since I set it to `nil' anyway. Add `:mkdir yes' to all `:tangle' header arguments so no issues arise when trying to tangle. Added three new packages: - helm-icons for integrating all-the-icons in Helm - org-tree-slide for orgmode powered presentations - wrap-region for wrapping selections with other chars than parenthesis Renamed variables in my custom Elisp functions so they stand out more as user-defined variables. Renamed `shortcuts' to `keybindings' Added keybindings for `org-tree-slide' Updated dotspacemacs file
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