Add sub folder icon when in home subdirectories

Big thanks to @dritter for guidance, @rjorgenson for great explanation.
And @bhilburn for further guidance and encouragement.
See http://i.imgur.com/2Vncypo.png for a presentation of how it looks.

README.md

@@ -210,11 +210,13 @@ others whole directories.
 | `Compatible` | `Powerline` | `Awesome Powerline` | Situation
 |------------|-----------|-------------------|----------------------------
 | None       | None      | ![home icon](https://cloud.githubusercontent.com/assets/1544760/12183451/40ec4016-b58f-11e5-9b9e-74e2b2f0b8b3.png) | Within Home folder         |
+| None       | None      | ![home sub_icon](https://cloud.githubusercontent.com/assets/1544760/12369315/8a5d762c-bbf5-11e5-8a20-ca1179f48d6c.png) | Within Home sub folder         |
 | None       | None      | ![folder icon](https://cloud.githubusercontent.com/assets/1544760/12183452/40f79286-b58f-11e5-9b8c-ed1343a07b08.png) | Outside of home folder     |
 
 To turn off these icons you could set these variables to an empty string.
 
     POWERLEVEL9K_HOME_ICON=''
+    POWERLEVEL9K_HOME_SUB_ICON=''
     POWERLEVEL9K_FOLDER_ICON=''
 
 ##### ip

functions/icons.zsh

@@ -44,6 +44,7 @@ case $POWERLEVEL9K_MODE in
       LINUX_ICON                     $'\UE271'              # 
       SUNOS_ICON                     $'\U1F31E '            # 🌞
       HOME_ICON                      $'\UE12C'              # 
+      HOME_SUB_ICON                  $'\UE18D'              # 
       FOLDER_ICON                    $'\UE818'              # 
       NETWORK_ICON                   $'\UE1AD'              # 
       LOAD_ICON                      $'\UE190 '             # 
@@ -96,6 +97,7 @@ case $POWERLEVEL9K_MODE in
       LINUX_ICON                     $'\UF17C'              # 
       SUNOS_ICON                     $'\UF185 '             # 
       HOME_ICON                      $'\UF015'              # 
+      HOME_SUB_ICON                  $'\UF07C'              # 
       FOLDER_ICON                    $'\UF115'              # 
       NETWORK_ICON                   $'\UF09E'              # 
       LOAD_ICON                      $'\UF080 '             # 
@@ -143,6 +145,7 @@ case $POWERLEVEL9K_MODE in
       LINUX_ICON                     'Lx'
       SUNOS_ICON                     'Sun'
       HOME_ICON                      ''
+      HOME_SUB_ICON                  ''
       FOLDER_ICON                    ''
       NETWORK_ICON                   'IP'
       LOAD_ICON                      'L'
@@ -202,4 +205,3 @@ get_icon_names() {
     echo "POWERLEVEL9K_$key: ${icons[$key]}"
   done
 }
-

powerlevel9k.zsh-theme

@@ -429,8 +429,10 @@ prompt_dir() {
   fi
 
   local current_icon=''
-  if [[ $(print -P "%~") == '~'* ]]; then
+  if [[ $(print -P "%~") == '~' ]]; then
     "$1_prompt_segment" "$0_HOME" "$2" "blue" "$DEFAULT_COLOR" "$current_path" 'HOME_ICON'
+  elif [[ $(print -P "%~") == '~'* ]]; then
+    "$1_prompt_segment" "$0_HOME_SUBFOLDER" "$2" "blue" "$DEFAULT_COLOR" "$current_path" 'HOME_SUB_ICON'
   else
     "$1_prompt_segment" "$0_DEFAULT" "$2" "blue" "$DEFAULT_COLOR" "$current_path" 'FOLDER_ICON'
   fi