Add compatibility for Tomcat 7. Fixes issue #4.
Add error logging/exception for failure to find valve.
Convert valve logging to org.apache.juli.logging.
Creating an empty session should save that session in the thread local.

So that a call to findSession doesn't unnecessarily attempt to retrieve it from Redis. This is an unexpected order of operations to support, but the Tomcat Manager app is doing it, so clearly it's possible.
Add manual dirty tracking feature.
Merge branch 'master' of github.com:jcoleman/tomcat-redis-session-manager into tomcat-7
Add Tomcat version support docs to README.
override remove(session, update) from ManagerBase.java
Merge pull request #8 from mehiel/upstream-master

override remove(session, update) from ManagerBase.java
java 7 code compatibility

1. try with resources
2. generic diamond inference
3. multi-catch exceptions
code cleanup

1. some @Override annotations added
2. removed unused imports
++
Remove unused logger from RedisSession
Merge pull request #11 from mehiel/code-cleanup

Code cleanup
Merge pull request #10 from mehiel/java7-compatibility

Take advantage of Java 7 features.

- try with resources
- generic diamond inference
- multi-catch exceptions
Fix configuration methods missing "static".
Fix configuration methods missing "static".
Merge branch 'java-7' of github.com:jcoleman/tomcat-redis-session-manager into java-7
Bump version to 1.2.
Bump version to 1.2.
Update readme to mention java-7 branch.