Hi,
I followed the instructions from the website but when I tried to install the dependencies I have problems with this:
Err http://mirrordirector.raspbian.org/raspbian/ jessie/main libtiffxx5 armhf 4.0.3-12.3+deb8u2
404 Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org/raspbian/ jessie/main gir1.2-gtk-2.0 armhf 2.24.25-3+deb8u1
404 Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org/raspbian/ jessie/main libavutil-dev armhf 6:11.8-1deb8u1+rpi1
404 Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org/raspbian/ jessie/main libavresample-dev armhf 6:11.8-1deb8u1+rpi1
404 Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org/raspbian/ jessie/main libavcodec-dev armhf 6:11.8-1deb8u1+rpi1
404 Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org/raspbian/ jessie/main libavformat-dev armhf 6:11.8-1deb8u1+rpi1
404 Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org/raspbian/ jessie/main libswscale-dev armhf 6:11.8-1~deb8u1+rpi1
404 Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org/raspbian/ jessie/main libgtk2.0-dev armhf 2.24.25-3+deb8u1
404 Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org/raspbian/ jessie/main libjasper-dev armhf 1.900.1-debian1-2.4+deb8u2
404 Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org/raspbian/ jessie/main libtiff5-dev armhf 4.0.3-12.3+deb8u2
404 Not Found [IP: 93.93.128.193 80]
Err http://mirrordirector.raspbian.org/raspbian/ jessie/main libudev-dev armhf 215-17+deb8u6
404 Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/t/tiff/libtiffxx5_4.0.3-12.3+deb8u2_armhf.deb 404 Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/g/gtk+2.0/gir1.2-gtk-2.0_2.24.25-3+deb8u1_armhf.deb 404 Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/liba/libav/libavutil-dev_11.8-1~deb8u1+rpi1_armhf.deb 404 Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/liba/libav/libavresample-dev_11.8-1~deb8u1+rpi1_armhf.deb 404 Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/liba/libav/libavcodec-dev_11.8-1~deb8u1+rpi1_armhf.deb 404 Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/liba/libav/libavformat-dev_11.8-1~deb8u1+rpi1_armhf.deb 404 Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/liba/libav/libswscale-dev_11.8-1~deb8u1+rpi1_armhf.deb 404 Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/g/gtk+2.0/libgtk2.0-dev_2.24.25-3+deb8u1_armhf.deb 404 Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/j/jasper/libjasper-dev_1.900.1-debian1-2.4+deb8u2_armhf.deb 404 Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/t/tiff/libtiff5-dev_4.0.3-12.3+deb8u2_armhf.deb 404 Not Found [IP: 93.93.128.193 80]
E: Failed to fetch http://mirrordirector.raspbian.org/raspbian/pool/main/s/systemd/libudev-dev_215-17+deb8u6_armhf.deb 404 Not Found [IP: 93.93.128.193 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?