Version v0.11.0

Version v0.11.0

Changelog:

NMEA:
- buf fix of VBW
- bug fix of waypoint fields of RMB, addressing issue #28
- enhancement and fix of RTE
- fix bug in initialization of GSV
- GSV satellite info field SNR is optional

General:
- fix header inclusion
- standard compliance with underscores

Math:
- floating point to integral casting

Build:
- add clang-11 and clang-12 to supported compilers
- add generic gcc and clang builds to build configs
- docker builds sorted according to docker ID
- docker gcc-10.2.0
- docker images, cmake upgrade, disable clang-3.9.1
- update docker build scripts

CI:
- GitLab-CI support added

Dev:
- docker builds official support off GCC-10
- improve robustness of CTags.cmake
- update of YCM, change config accordingly

Utils:
- extensions and bug fix in utils::mmsi
- fix script `print-changelog`

Doc:
- enhancing the overview of examples