[split] Move jacaetevha theme to oh-my-fish/theme-jacaetevha

https://github.com/oh-my-fish/theme-jacaetevha

themes/jacaetevha/README.md

-## jacaetevha
-
-A theme optimized for people who use:
-
-* Git
-* Unicode-compatible fonts and terminals (I use iTerm2 + Monaco)
-
-For Mac users, I highly recommend iTerm 2.
-
-![jacaetevha
-theme](http://jacaetevha.github.io/oh-my-fish/screenshot.png)
-
-
-#### Characteristics
-
-* Left-hand prompt:
-```
-    <user> at <host> in <abbreviated path> <total size of files in dir> (<current Git branch>)
-    ↪ 
-```
-* Right-hand prompt:
-```
-    <current date>
-```

themes/jacaetevha/fish_prompt.fish

-# name: Jacaetevha
-function tbytes -d 'calculates the total size of the files in the current directory'
-  set -l tBytes (ls -al | grep "^-" | awk 'BEGIN {i=0} { i += $5 } END { print i }')
-  
-  if test $tBytes -lt 1048576
-    set -g total (echo -e "scale=3 \n$tBytes/1048 \nquit" | bc)
-    set -g units " Kb"
-  else
-    set -g total (echo -e "scale=3 \n$tBytes/1048576 \nquit" | bc)
-    set -g units " Mb"
-  end
-  echo -n "$total$units"
-end
-
-function fish_prompt
-  set_color yellow
-  printf '%s' (whoami)
-  set_color normal
-  printf ' at '
-
-  set_color magenta
-  printf '%s' (hostname|cut -d . -f 1)
-  set_color normal
-  printf ' in '
-
-  set_color $fish_color_cwd
-  printf '%s ' (prompt_pwd)
-  set_color blue
-  printf '%s' (tbytes)
-  set_color normal
-  printf '%s' (__fish_git_prompt)
-
-  # Line 2
-  echo
-  if test $VIRTUAL_ENV
-      printf "(%s) " (set_color blue)(basename $VIRTUAL_ENV)(set_color normal)
-  end
-  printf '↪  '
-  set_color normal
-end
-

themes/jacaetevha/fish_right_prompt.fish

-function fish_right_prompt -d "Write out the right prompt"
-    set_color yellow
-    date
-    set_color normal
-end