Avoid conflicting namespaces

[bschilder]

I need to go back and remove some functions that are now present in multiple subpackages to avoid these namespace conflicts when all of these are imported:

Warning: replacing previous import 'echoconda::set_permissions' by 'echodata::set_permissions' when loading 'echolocatoR'
Warning: replacing previous import 'catalogueR::get_sample_size' by 'echodata::get_sample_size' when loading 'echolocatoR'
Warning: replacing previous import 'catalogueR::createDT' by 'echodata::createDT' when loading 'echolocatoR'
Warning: replacing previous import 'catalogueR::get_os' by 'echodata::get_os' when loading 'echolocatoR'

[bschilder]

• [x] choconda::set_permissions
• [x] catalogueR::get_sample_size
• [x] catalogueR::createDT
• [x] catalogueR::get_os