Rename libevent to libevent-modified to avoid confusion.
Our version of libevent ships with some changes required for dnscrypt-proxy to
work. These will eventually be submitted upstream after libevent 2.1 gets
released.
Update ChangeLog
Update .gitignore
Update NEWS
Update Android NDK to r8d
Back to a stable Xcode version
libevent update to b618204216235d5998080c659c8ad53185fdf206