Bash scripts: centralized all 'library' functions in a single file
All copyright forms updated to 2020.
minor fixes to QtCreatroSetup.sh
Introduced optional CH_CFG_ST_TIMEDELTA definition per module.If no value is specified by the module, a conservative fallback of 1000µs is set.
fixed a common typo in many shell scripts and updated submodules
The QtCreator setup script now runs an additional check when looking for the gcc include directory.
Bash scripts: introduced a new function to check dependencies.This function is used by several files to ensure that git, make, etc. are available.
updated all file headers to 2019
QtCreatorSetup: fixed a bug caused by the multithreaded call of make
Minor enhancement to the QtCreator setup script
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