Increase minor version number to 9

Bump version to 1.9.0-SNAPSHOT, increasing the minor as the next
release includes interface changes.

build.moxie

diff --git a/build.moxie b/build.moxie
index 07208cc..eb05e2c 100644
--- a/build.moxie
+++ b/build.moxie
@@ -10,7 +10,7 @@
 description: pure Java Git solution
 groupId: com.gitblit
 artifactId: gitblit
-version: 1.8.1-SNAPSHOT
+version: 1.9.0-SNAPSHOT
 inceptionYear: 2011
 
 # Current stable release