upgrade to 0.2
adds load() implementation
add load() tests
add javadoc, param null guard
load tests
complete javadoc
add initial getPassword() implementation
Updating javadoc and notes.
expand visibility of instantiateKeyStore() to protected and make it available to subclasses
expand file utility method exists() visibility to protected to
make it available to subclasses
fix javadoc
load keystore into memory at construction time
- Remove no-arg constructor. A master password must always be supplied
  even for in-memory keystore instances.
- Construct through superclass init() method to ensure finally block
  to clear password array is always called, even in case of superclass
  constructor exceptions
Initialize through init() method to allow subclasses to separate constructor call and init() calls for better flow for error handling
no arg constructor tests
- change the constructor exception type to one of checked and
  declared exceptions
- construct via init() implementation for better error handling
- add a workaround for the add() method until the superclass
  can be refactored
- add a missing arg to exception message
instantiate tests
add tests for constructors
add addPassword() tests