Update README.md
Minor change in the reverting installation procedure
added: installation of newer yasm version on DSM <5, more output, better logging,  and other bugfixes
Merge branch 'master' of https://github.com/CutePoisonX/ffmpegInstaller
Fixed minor bug where yasm installation got reverted even when not installed
Final support of PowerPc e500v cpu
Added some missing condition-variables
Added some missing condition-variables
minor commit