Read the project yaml file
Arguments
- iso3c
- country isocode alpha-2 
- path
- path to directory to save the configuration file 
- filename
- name of the file (default config_ - iso3c.yml)
- projdir
- full path of the project; will be used as default path for not-provided path. 
- raw
- logical, should the read yaml file be return without pre-processing (this includes merging paths for known directories of the project), FALSE by default.