Merge pull request #469 from chriseth/version

Set version to 0.3.1.

Author: chriseth

CMakeLists.txt

@@ -8,7 +8,7 @@ include(EthPolicy)
 eth_policy()
 
 # project name and version should be set after cmake_policy CMP0048
-set(PROJECT_VERSION "0.3.0")
+set(PROJECT_VERSION "0.3.1")
 project(solidity VERSION ${PROJECT_VERSION})
 
 # Let's find our dependencies