Minor changes
We have a basic session hash, but no session store
We can store sessions in a memory pool, but we don't handle concurrency issues yet
We can access sessions in the pool from multiple threads simultaneously
Notify when sessions are created or accessed in session store
We can launch periodic housekeeping chores, but we don't have any defined yet
We can remove expired and invalid sessions from the pool

--HG--
rename : webapp/src/main/java/org/testinfected/molecule/session/PeriodicHouseKeeper.java => webapp/src/main/java/org/testinfected/molecule/session/PeriodicChores.java
rename : webapp/src/test/java/test/unit/org/testinfected/molecule/session/PeriodicHouseKeeperTest.java => webapp/src/test/java/test/unit/org/testinfected/molecule/session/PeriodicChoresTest.java
We remove expired and invalid sessions from the pool when they are accessed

--HG--
rename : webapp/src/main/java/org/testinfected/molecule/session/PeriodicChores.java => webapp/src/main/java/org/testinfected/molecule/session/PeriodicSessionHouseKeeping.java
rename : webapp/src/test/java/test/unit/org/testinfected/molecule/session/PeriodicChoresTest.java => webapp/src/test/java/test/unit/org/testinfected/molecule/session/PeriodicSessionHouseKeepingTest.java
We can track client sessions across requests
We use our own session implementation, which uses an in memory session pool.

We should be ready for upgrade to Simple 5.x
Upgrade to SimpleWeb 5.1.4