Minor bug fix release

0.2.5

Incr version & config utility methods for type conversions

Release with out-of-the-box implementations and samples

0.2.4

Update release version to 0.2.4

Bug fix release

Assign a reasonable default to previous checkpoint (#33)

Instant.MIN can cause overflow errors.
Fixes #32

Dhalion API V2

New features:

1. New and consistent definition of facts created by policy phases; Measurement, Symptom, Diagnosis and Actions.
2. All facts are provided in table structures. Tables replace deep-nested HashMap
3. Fact tables provide fluent interfaces for intuitive application of filters.
4. Facts generated during policy execution are retained in caches and provided through context for lookup.
5. Each policy cycle is also tagged with a checkpoint timestamp.