Assign git service icon depending on repo origin

Check git origin url to search for well know services. Return
proper icon if service found, if not return "git" icon from
font-awesome icon set

functions/vcs.zsh

@@ -110,7 +110,18 @@ function +vi-hg-bookmarks() {
 
 function +vi-vcs-detect-changes() {
   if [[ "${hook_com[vcs]}" == "git" ]]; then
-    vcs_visual_identifier='VCS_GIT_ICON'
+
+    local remote=`git ls-remote --get-url`
+    if [[ "$remote" =~ "github" ]] then
+      vcs_visual_identifier='VCS_GIT_GITHUB_ICON'
+    elif [[ "$remote" =~ "bitbucket" ]] then
+      vcs_visual_identifier='VCS_GIT_BITBUCKET_ICON'
+    elif [[ "$remote" =~ "gitlab" ]] then
+      vcs_visual_identifier='VCS_GIT_GITLAB_ICON'
+    else
+      vcs_visual_identifier='VCS_GIT_ICON'
+    fi
+
   elif [[ "${hook_com[vcs]}" == "hg" ]]; then
     vcs_visual_identifier='VCS_HG_ICON'
   elif [[ "${hook_com[vcs]}" == "svn" ]]; then