1.0.0

1. Added fetch strategies as public api. Now you can choose what kind
   of initialization to perform. This allows you to define what of two
   initial fetching variants to use:
   MemoryCacheMode.EAGER - fills in-memory cache immediately, sometimes it take a long time
   MemoryCacheMode.LAZY - fills in-memory cache on demand, initial fetching is only store meta

2. Added byte array serializer as public api. Now you can store your
   binary data right in storage fast and securly as possible.

3. getAll method now deprecated. Please, use keys mehtod for getting
   all preferences keys because getAll always creates overhead for in-mem
   utilization.

4. Implemented twice or more transaction running check.
   Now if you trying to call apply or commit twice or more for one
   instance of PreferencesEditor - TransactionInvalidatedException
   will be thrown.

5. Internal api changes (global locks refactoring, structural changes,
   reduced references creation for transactions).

6. Final small bug fixes.

1.0.0-BETA-2

1. Changed base64 file name algorithm to custom file-safe name encoding
   with only lower cased chars and numbers table (a-z-0-9). Sorry guys if you use
   XorKeyEncryptionImpl implementation as file name encryption just rename your
   preferences directory after updating up to 1.0.0-beta2.

2. Improved performance for cache initialization (especially for Set<String>
   and getAll method).

3. Few cosmetic changes and some javadoc updates for several api.