Update README.md

Added XML formatting
Changed version to 1.2
Rename README to README.md
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Converted to markdown format, added offline usage scenario
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Fix typo
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Fix h2 DB file location
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Performance improvements:
- Modified the enforcer to use JCS for caching.
- Reduced the number of algorithms used when hashing (SHA512 only)
- Made enforcer inspect artifacts using ExecutionService / Thread pool.

Seems much faster now :-)
- Refactored a bunch of the caching code and added configuration options.
- Better error reporting and debugging
- Added a bunch of helper functions to execution context
- Silly bug in caching configuration
- Few cleanup tasks
- Added some tests around caching
fixed things
 - Add license info.
 - Update to allow purge cache
 - Update to remove invalid settings
 - Cache is tied to the last update time of the database
Actually adding license to headers
Switch to using cached executor thread pool and removed the nthreads configuration stuff
 - Improved and stable concurrency and caching
 - Daily updates are now and option rather than always
Preparation for release.
[maven-release-plugin] prepare release enforce-victims-rule-1.3
[maven-release-plugin] prepare for next development iteration
Update README and sample pom for 1.3
Change spring back to 2.5.6 in sample
Updating victims-lib to 1.3.1

- Consumed fix for Issue #4
- Minor formatting fixes
- Consuded exception changes