Add "about" page in the documentation

Change-Id: Ie95565dc5db0c69ae97ae8579ef675c81cdf811e
Signed-off-by: David Pursehouse <david.pursehouse@sonymobile.com>

src/main/resources/Documentation/about.md

diff --git a/src/main/resources/Documentation/about.md b/src/main/resources/Documentation/about.md
new file mode 100644
index 0000000..d879e2e
--- /dev/null
+++ b/src/main/resources/Documentation/about.md
@@ -0,0 +1,4 @@
+This plugin allows the rendering of Git repository branch network
+in a graphical HTML5 Canvas. It is mainly intended to be used as
+"project link" in a GitWeb configuration or by other Gerrit GWT UI
+plugins to be plugged elsewhere in Gerrit.

src/main/resources/Documentation/config.md

diff --git a/src/main/resources/Documentation/config.md b/src/main/resources/Documentation/config.md
index 9adfc69..c14d1e9 100644
--- a/src/main/resources/Documentation/config.md
+++ b/src/main/resources/Documentation/config.md
@@ -1,10 +1,5 @@
 Git branch network graph
-=========================
-
-This plugin allows the rendering of Git repository branch network
-in a graphical HTML5 Canvas. It is mainly intended to be used as
-"project link" in a GitWeb configuration or by other Gerrit GWT UI
-plugins to be plugged elsewhere in Gerrit.
+========================
 
 GitWeb configuration
 --------------------