javascriptcore: On Linux base64 has no -D and -o parameters

Fixes issue #7
openh264: Use standard include path

Otherwise we're incompatible with the openh264 versions installed
manually from the upstream build system.
Fix openwebrtc-gst-plugins build
build fails on stock kubuntu 64-bit without the gperf package
libusrsctp: Fix build on iOS by using the correct path for the headers that are copied

Use the same method for identifying the iPhoneSimulator SDK as we have
used elsewhere
Fix openwebrtc-gst-plugins-build after OpenSSL autoconf check

Added OPENSSL_CFLAGS to CFLAGS and OPENSSL_LIBS to LIBS
dependencies: Update libnice to version 0.1.8
dependencies: patch libnice to do DNS resolution

The patch makes it possible to use hostnames as ICE urls in RTCConfiguration
objects.
vagrant zlib timeout fix