Set the version to 0.7.1.

Fix wrong imports.

Fix missing includes of <sys/types.h> for ssize_t.

Update the ChangeLog for 0.5.4.

Update ChangeLog.

Update ChangeLog.

Update ChangeLog.

Set version to 0.5.

Update ChangeLog for 0.4-alpha1.

Set version to 0.3.1 in 0.3 branch.