Added fancy-ctrl-z plugin

Use Ctrl-Z to switch back to Vim
I frequently need to execute random command in my shell. To achieve it I pause
Vim by pressing Ctrl-z, type command and press fg<Enter> to switch back to Vim.

The fg part really hurts me. I just wanted to hit Ctrl-z once again to get back
to Vim.
I could not find a solution, so I developed one on my own that works wonderfully
with ZSH.

Source: http://sheerun.net/2014/03/21/how-to-boost-your-vim-productivity/

plugins/fancy-ctrl-z/fancy-ctrl-z.plugin.zsh

@@ -0,0 +1,21 @@
+# Use Ctrl-Z to switch back to Vim
+# I frequently need to execute random command in my shell. To achieve it I pause 
+# Vim by pressing Ctrl-z, type command and press fg<Enter> to switch back to Vim.
+# The fg part really hurt sme. I just wanted to hit Ctrl-z once again to get back 
+# to Vim. I could not find a solution, so I developed one on my own that 
+# works wonderfully with ZSH
+#
+# Source: http://sheerun.net/2014/03/21/how-to-boost-your-vim-productivity/
+
+fancy-ctrl-z () {
+  if [[ $#BUFFER -eq 0 ]]; then
+    BUFFER="fg"
+    zle accept-line
+  else
+    zle push-input
+    zle clear-screen
+  fi
+}
+zle -N fancy-ctrl-z
+bindkey '^Z' fancy-ctrl-z
+