Added Tomorrow theme to project, other updates

+ Added tomorrow theme
+ added spectrum.zsh
+ added zsh/lib directory
+ updated prompt
+ updated colors
+ set vim theme to Tomorrow-Night-Bright
+ moved some zsh files to zsh/lib

zsh/lib/completion.zsh

@@ -0,0 +1,5 @@
+# matches case insensitive for lowercase
+zstyle ':completion:*' matcher-list 'm:{a-z}={A-Z}'
+
+# pasting with tabs doesn't perform completion
+zstyle ':completion:*' insert-tab pending