Add common error to help people trying to build this.

This solved it just fine for me.
Merge pull request #14 from unknownbrackets/win-readme

Add common error to README
Corrected lipo lines in ios-build.sh (missing .a exts); added iOS binaries
Merge pull request #15 from jtraynham/master

Updated ios-build.sh script; Added iOS binaries
Build ffmpeg for 64-bit MacOSX
Add linux bulid script

Basic low effort copy of mac build script
Merge pull request #16 from daniel-dressler/master

Add linux build script
Add linux prebuilt lib
Merge pull request #17 from daniel-dressler/master

Add prebuilt libs for linux x64
Add Symbian support.
Automatically copy Symbian libs to LIB dir with correct naming. Symbian doesn't seem to like external LIB dirs. It also doesn't like linking .a files.
Use a symbian-install file for people who just want the libs.
Fix ffmpeg for Symbian. Works perfect now.
Update symbian scripts.
FFMPEG for Android x86
FFMPEG for Linux x86.
Add build script.
Merge pull request #18 from thedax/ffmpegLinux-x86

Add FFMPEG for Linux x86_32.
Add a snapshot of ffmpeg master
Merge Maxim's Atrac3+ patch