Documentation update

Update some documentation to show the use of paths for submodules.

.gitignore

@@ -1,2 +1,3 @@
 pkg
 email.txt
+.todo*

README.txt

@@ -16,8 +16,8 @@ Tools to help using git with rails
 == SYNOPSIS:
 
   git-rails init {remote git repository}
-  git-rails install [remote plugin repository]
-  git-rails update plugin-name
+  git-rails install <remote plugin repository> [plugin name||path]
+  git-rails update <plugin-name||path>
 
 == REQUIREMENTS:
 

bin/git-rails

@@ -54,12 +54,14 @@ Main {
 
   mode(:install){
     description <<-txt
-      installs a plugin from a remote git repository
+      installs a plugin from a remote git repository as a git submodule.
+      installs to a path if provided e.g. vendor/rails
 
     txt
 
     examples <<-txt
       . git-rails install git://gitorious.org/rur/mainline.git plugin-name
+      . git-rails install git://github.com/koz/rails.git vendor/rails
     txt
 
     mixin :argument_remote, :argument_plugin_name
@@ -72,10 +74,12 @@ Main {
   mode(:update){
     description <<-txt
       updates a plugin from original source
+      updates a submodule as declared by the path
     txt
 
     examples <<-txt
       . git-rails update plugin-name
+      . git-rails update vendor/plugin
     txt
 
     mixin :argument_plugin_name