Start working on 3.0.2 migration
Migration to DSS 3

- Added source file validation
- Fixed level setting and validation bug
- Deleted deprecated classes
- Minor changes
- Changes to the imported model
Complete test with DSS 3.0.2

- Deprecated implicit policy
- New exception for signature policy errors
- Improved main class with javadocs, validation and original code references
- Updated README.md
- Edited testing run configuration
- Added Apache Commons IO reference in `pom.xml`
Reset project files for migration to IDEA 13
Update project name and copyright
Add IDEA 13 projects
New unit/integration test configurations
Refactor, include copyright and IDEA modules
Validate service URL
Complete update and test DSS 3.0.2

- Added custom exception messages
- Added Apache Commons IO to list of used libraries
- Minor changes
Builder pattern for signing, untested
Merge branch 'feature/update-dss-3.0.2' into develop
Export in builder library, update configurations, update copyright

- Exported the whole system from the CLI program to an external library
- Changed project name and references
- Updated run configurations
- Updated copyright notice in all files
Merge branch 'feature/builder-pattern' into develop
Update README.md
Remove classes dir, useless code
Add license, description to POM
Limit test to unit tests

- Testing limited to unit tests
- Added MANIFEST.MF for jar launching
- Added surefire plugin for test configuration
- Moved to latest JUnit
Add dependency to jar
Fix archive process, case sensitivity