doc api/grn_ctx.txt: use "Groonga" notation
doc api/grn_obj.txt: use "Groonga" notation
doc command_version.txt: use "Groonga" notation
doc commands/check.txt: use "Groonga" notaion
doc commands/clearlock.txt: use "Groonga" notation
doc commands/column_create.txt: use "Groonga" notation
doc commands/column_list.txt: use "Groonga" notation
doc commands/column_remove.txt: use "Groonga" notation
doc commands/define_selector.txt: use "Groonga" notation
doc commands/defrag.txt: use "Groonga" notation
doc commands/dump.txt: use "Groonga" notation
doc commands/log_level.txt: use "Groonga" notation
doc: remove trailing spaces
doc commands/log_reopen.txt: use "Groonga" notation
doc commands/quit.txt: use "Groonga" notation
doc commands/shutdown.txt: use "Groonga" notation
doc commands/status.txt: use "Groonga" notation
doc commands/reference.txt: use "Groonga" notation
doc reference.po: use "Groonga" notation
doc commands/table_list.txt: use "Groonga" notation