Revised document sandbox/asakusa-on-emr (#420).
Add doucment for using Hive (#403, #409, #420)
 Revised top-level README file (#420).
Changed gradle version to 2.1 (#420).
Updates product/target-platform (#420).
Deletes attachAssemble task (#420).
Fixed typo (#420).
Add issues from 0.7.0-RC2 (#420).
Add document link (#420).
Fix operator compiler for Eclipse 4.4 (#440).
Temporary support for parquet-hadoop-1.2.5 (#409).
Direct I/O CSV/TSV should inherit Hadoopconf(#441).
Merge remote-tracking branch 'private/issue/420-M30' into 0.7-develop
Merge remote-tracking branch 'private/issue/440' into 0.7-develop
Merge remote-tracking branch 'private/issue/409-M30' into 0.7-develop
Merge remote-tracking branch 'private/issue/441' into 0.7-develop
Merge tag '0.7.0-M31' into 0.7-hadoop1-develop

Released version 0.7.0-M31
 Fix for checkstyle (#421).
Merge remote-tracking branch 'private/issue/421-M31' into 0.7-develop
Merge tag '0.7.0-M32' into 0.7-hadoop1-develop

Released version 0.7.0-M32