ffmpeg: update

While I know this probably shouldn't go into stable branch, this update
is API/ABI-compatible and contains several very important security
fixes, including
http://blog.securitymouse.com/2014/06/raising-lazarus-20-year-old-bug-that.html

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
openssl: update

Again, a security update, including the fix for Heartbleed.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Backport openssl patches

Closes #429.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Update year of copyright notice to 2014
gdk-pixbuf: install files when autoreconfing

Might fix #451.
Reduce difference with master

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
index: fix dead link

Closes #482.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
gc: fix download

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Add target download-only-* to ease developing

Signed-off-by: Timothy Gu <timothygu99@gmail.com>

Conflicts:
	Makefile
qt: Fix downloading

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
imagemagick: fix download

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
gd: Fix download

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
gdal: Fix download

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
hdf5: Fix download

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
opencv: Fix download

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
pcl: Fix download

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
package sfml: fix freetype detection
index: Fix MacPorts installation of git

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Reduce the memory requirement to 2 GiB

Our DigitalOcean machine can build all packages successfully, with one thread.
gtkimageview: Fix download URL

Fixes part of #532.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
(cherry picked from commit 5cb1270f8cfe9beb6aa47fbf656cc40fee01af82)