AsyncWriteEngine: remove clearCache condition
Site: update dictionary
HTreeMap: add maximal cache size, add CacheOffHeap examples
HTreeMap: fix typo in method name
DBMaker: cleanup JVM shutdown code. See #272
EngineWrapper: fix typo
Doc: update maps
DB: fixed DB.createXXX() does not throw exception if collection already exists. See #282
Javadoc: fix typo
Store: Fix invalid checksum computation with compress enabled
Store: Fix invalid checksum occuring with long serializer names
Merge pull request #285 from Toilal/checksum-fix

Checksum fix
Merge branch 'master' of https://github.com/jankotek/MapDB
StoreDirect: SerializerPojo could get  corrupted on close. See #261
Site: documentation in progress
Engine & TxMaker: make snapshots part of Engine interface.

This makes architecture bit clearer, and prepares us for Append-Only store #241 and native Store snapshots #200. Also makes fix for #281 easiyer
StoreWrapper: remove DebugEngine. This will need much more improvements, and should be probably in separate project
EngineWrapper: revert DebugEngine removal
BTreeMap.containsKey now does not deserialise values when used in conjunction with valuesOutsideNodes setting
Site theme changed to bootswatch-spruce.