checkyaml: Rename "tables" to "table"
checkyaml: Rename "tables" to "table"

in order to match Liblouis terminology better: "table" is a list of
table files, not a single file.

Also adapt function names.

liblouis/liblouis,hammera/liblouis,IndexBraille/liblouis,IndexBraille/liblouis,BueVest/liblouis,IndexBraille/liblouis,BueVest/liblouis,hammera/liblouis,BueVest/liblouis,vsmontalvao/liblouis,vsmontalvao/liblouis,BueVest/liblouis,liblouis/liblouis,vsmontalvao/liblouis,IndexBraille/liblouis,BueVest/liblouis,liblouis/liblouis,IndexBraille/liblouis,hammera/liblouis,liblouis/liblouis,vsmontalvao/liblouis,vsmontalvao/liblouis,liblouis/liblouis,hammera/liblouis,BueVest/liblouis,liblouis/liblouis,hammera/liblouis,hammera/liblouis