v1.0.11 improve cmake

Merge pull request paolostivanin#8 from paolostivanin/fixes

Add compatibility with libbaseencode 1.0.4

fix shippable badge

fix paolostivanin#4

increase version number

Merge pull request paolostivanin#1 from paolostivanin/develop

Release v1.0.6

Initializa gcrypt if not done by the caller

- fallback to 6 digits if the given number is neither 6 nor 8

v1.0.4 fix cmake file and update readme

Version 1.0.3

- add hotp_verify function
- add cmake file and removed old compile.sh
- update readme
- removed 'static' keyword from two functions definition in otp.c