LibreCaptcha v1.1.0 Beta 1

• Alphabets which are confusing, such as O, 0, I, l are now disabled by default
• Added a simple browser based demo which can be found at http://localhost:8888/demo/index.html
• Improved PoppingCharactersCaptcha (renamed from GifCaptcha) (#89)
• The background thread now generates all types of Captchas (#84)
• Removed a dependency which was GPL licensed (#66)
• Added functional test (#71)
• Run performance and functional tests in CI