・Introduced the notation "e_{mod}" and "e^\ast_{mod}" in the third sentence of statement of Theorem 1.10
　and replaced "d^\ast_{mod}" by "e^\ast_{mod}" in the terms linear in l in the final two displays of
　the statement of Theorem 1.10

・In Step (iii) of the proof of Theorem 1.10, replaced "d_{mod}" by "e_{mod}" and "d^\ast_{mod}" by 
　"e^\ast_{mod}" in the definition of "\iota_{w_Q}" and in (R1), (R2), (R3), (R4)

・In Step (v) of the proof of Theorem 1.10, replaced "d^\ast_{mod}" by "e^\ast_{mod}"

・In Step (viii) of the proof of Theorem 1.10, replaced "d^\ast_{mod}" by "e^\ast_{mod}" (together 
　with one related instance of "d_{mod}" by "e_{mod}")

・In Remark 1.10.5, (iii), replaced "d^\ast_{mod}" by "e^\ast_{mod}"

・Added Remark 1.10.7

・In the application of Theorem 1.10 in the proof of Corollary 2.2, added a reference to Remark 1.10.7, (i)