Prepare for release

See #24, release log:

• 6e0b22f by @pollyvolk: Merge pull request #24 from po...
• 6c6fa45 by @pollyvolk: Prepare for release
• 8ee375f by @pollyvolk: Merge pull request #23 from po...
• 3a56a79 by @pollyvolk: Changes in style
• bba84bc by @pollyvolk: Some changes
• 40d7226 by @pollyvolk: Add README
• 8460d49 by @pollyvolk: Merge pull request #22 from po...
• ead058e by @pollyvolk: Fix in javadoc
• 0f082f2 by @pollyvolk: Add tests for pptx generation
• 7465072 by @pollyvolk: Add complex test of generated ...
• 82bd1c2 by @pollyvolk: Add simple test of generated f...
• 1968d0b by @pollyvolk: Fixed vulnerabilities
• 6950ea8 by @pollyvolk: Add more tests
• e5feb0f by @pollyvolk: Add tests
• f39f49b by @pollyvolk: Some fixes
• 1841b3f by @pollyvolk: Add dependencies
• 0e1ebe5 by @pollyvolk: Change messages in exceptions
• e7f7399 by @pollyvolk: Merge pull request #21 from po...
• a7f0dd3 by @pollyvolk: Handle exceptions in Main
• 2b72667 by @pollyvolk: Merge pull request #20 from po...
• and 37 more...

Released by Rultor 2.0-SNAPSHOT, see build log