Remove ChangeLog. No one has defended its existence, and a few people

ChangeLogs/ChangeLog-7.1-7.1.1

ChangeLogs/ChangeLog-7.1RC1-to-7.1RC2

ChangeLogs/ChangeLog-7.1RC2-to-7.1RC3

ChangeLogs/ChangeLog-7.1RC3-to-7.1rc4

ChangeLogs/ChangeLog-7.1beta1-to-7.1beta3

ChangeLogs/ChangeLog-7.1beta3-to-7.1beta4

ChangeLogs/ChangeLog-7.1beta4-to-7.1beta5

ChangeLogs/ChangeLog-7.1beta5-to-7.1beta6

ChangeLogs/ChangeLog-7.1beta6-7.1RC1

ChangeLogs/ChangeLog-7.1rc4-7.1