Release Notes - Mnemonic - Version 0.12.0

** Sub-task
    * [MNEMONIC-389] - ParameterHolder should contain reclaim context
    * [MNEMONIC-481] - Add reference breaking operation in Durable class
    * [MNEMONIC-482] - Support reference breaking mark on specified fields
    * [MNEMONIC-483] - Construct a test case to verify the reference breaking
    * [MNEMONIC-484] - Implement the reference breaking function for Generic Field
    * [MNEMONIC-486] - Implement the functionality of reference breaking mark for general durable object
    * [MNEMONIC-487] - Implement the functionality of reference breaking mark for durable array
    * [MNEMONIC-488] - Implement the functionality of reference breaking mark for durable hashmap
    * [MNEMONIC-489] - Implement the functionality of reference breaking mark for durable hashset
    * [MNEMONIC-490] - Implement the functionality of reference breaking mark for durable tree
    * [MNEMONIC-491] - Implement the functionality of reference breaking mark for durable chunk
    * [MNEMONIC-492] - Implement the functionality of reference breaking mark for durable buffer
    * [MNEMONIC-493] - Implement the functionality of reference breaking mark for generic field
    * [MNEMONIC-499] - The refBreak function should be prevented from reclaimable referred durable object

** Bug
    * [MNEMONIC-496] - bundle.js file not found

** New Feature
    * [MNEMONIC-480] - Reference Breaking

** Improvement
    * [MNEMONIC-404] - Simplify the interface of EntityFactoryProxy
    * [MNEMONIC-405] -  Retrieve durable object field info from its factory
    * [MNEMONIC-494] - Improve the build instruction for constructing website

** Task
    * [MNEMONIC-458] - Upgrade Spark artifacts to v2.3.0
    * [MNEMONIC-485] - Add ApacheCon event promotion to our project site
    * [MNEMONIC-495] - Update Develop webpage for adding new PMC member