Minor updates and NAME>INTERPRET improved
filetest.fth
- renamed SSQ10, SSQ11, SSQ12 to SSQ11, SSQ12, SSQ13 to avoid redefinition
messages
stringtest.fth
- renamed BUF to SUBBUF to avoid redefinition message
toolstest.fth
- improved NAME>INTERPRET test
- in >UPPERCASE replaced ?DO with IF etc as ?DO is Coer Extension
- renamed first GET-ALL to (GET-ALL) to avoid redefinition message