Added add-zsh-hook support to themes

I added add-zsh-hook support to the themes that didn't have it already.
This allows the themes to co-exist with plugins and lib/termsupport.

themes/apple.zsh-theme

@@ -18,9 +18,12 @@ zstyle ':vcs_info:*' formats       \
 zstyle ':vcs_info:(sv[nk]|bzr):*' branchformat '%b%F{1}:%F{3}%r'
 zstyle ':vcs_info:*' enable git cvs svn
 
-precmd () {
+theme_precmd () {
     vcs_info
 }
 
 setopt prompt_subst
 PROMPT='%{$fg[magenta]%}$(toon)%{$reset_color%} %~/ %{$reset_color%}${vcs_info_msg_0_}%{$reset_color%}'
+
+autoload -U add-zsh-hook
+add-zsh-hook precmd theme_precmd

themes/jonathan.zsh-theme

@@ -1,4 +1,4 @@
-function precmd {
+function theme_precmd {
     local TERMWIDTH
     (( TERMWIDTH = ${COLUMNS} - 1 ))
 
@@ -24,7 +24,7 @@ function precmd {
 
 
 setopt extended_glob
-preexec () {
+theme_preexec () {
     if [[ "$TERM" == "screen" ]]; then
 	local CMD=${1[(wr)^(*=*|sudo|-*)]}
 	echo -n "\ek$CMD\e\\"
@@ -135,3 +135,7 @@ $PR_CYAN$PR_SHIFT_IN$PR_HBAR$PR_SHIFT_OUT$PR_NO_COLOUR '
 }
 
 setprompt
+
+autoload -U add-zsh-hook
+add-zsh-hook precmd  theme_precmd
+add-zsh-hook preexec theme_preexec

themes/kolo.zsh-theme

@@ -7,7 +7,7 @@ zstyle ':vcs_info:*' unstagedstr '%F{yellow}●'
 zstyle ':vcs_info:*' check-for-changes true
 zstyle ':vcs_info:(sv[nk]|bzr):*' branchformat '%b%F{1}:%F{11}%r'
 zstyle ':vcs_info:*' enable git svn
-precmd () {
+theme_precmd () {
     if [[ -z $(git ls-files --other --exclude-standard 2> /dev/null) ]] {
         zstyle ':vcs_info:*' formats ' [%b%c%u%B%F{green}]'
     } else {
@@ -19,3 +19,6 @@ precmd () {
 
 setopt prompt_subst
 PROMPT='%B%F{magenta}%c%B%F{green}${vcs_info_msg_0_}%B%F{magenta} %{$reset_color%}%% '
+
+autoload -U add-zsh-hook
+add-zsh-hook precmd  theme_precmd