Only build 0.1 branch against 3.0 core

3.1 and master no longer supported there

.travis.yml

@@ -6,14 +6,6 @@ php:
 
 env:
  - DB=MYSQL CORE_RELEASE=3.0
- - DB=MYSQL CORE_RELEASE=3.1
- - DB=MYSQL CORE_RELEASE=master
- - DB=PGSQL CORE_RELEASE=master
-
-matrix:
-  include:
-    - php: 5.4
-      env: DB=MYSQL CORE_RELEASE=master
 
 before_script:
  - git clone git://github.com/silverstripe-labs/silverstripe-travis-support.git ~/travis-support
@@ -21,4 +13,4 @@ before_script:
  - cd ~/builds/ss
 
 script: 
- - phpunit widgets/tests/
+ - phpunit widgets/tests/