doc: added TOC.

README.markdown

@@ -3,6 +3,17 @@ Name
 
 ngx_openresty - Turning Nginx into a full-fledged Web App Server
 
+Table of Contents
+=================
+
+* [Name](#name)
+* [Description](#description)
+    * [For Users](#for-users)
+    * [For Bundle Maintainers](#for-bundle-maintainers)
+* [Mailing List](#mailing-list)
+* [Report Bugs](#report-bugs)
+* [Copyright & License](#copyright--license)
+
 Description
 ===========
 
@@ -37,6 +48,8 @@ To reproduce the bundle tarball, just do
 
 at the top of the bundle source tree.
 
+[Back to TOC](#table-of-contents)
+
 Mailing List
 ============
 
@@ -48,6 +61,8 @@ The Chinese mailing list is here:
 
     https://groups.google.com/group/openresty
 
+[Back to TOC](#table-of-contents)
+
 Report Bugs
 ===========
 
@@ -55,6 +70,8 @@ You're very welcome to report issues on GitHub:
 
     https://github.com/agentzh/ngx_openresty/issues
 
+[Back to TOC](#table-of-contents)
+
 Copyright & License
 ===================
 
@@ -83,3 +100,5 @@ LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+[Back to TOC](#table-of-contents)
+