Update Readme.md

+ added Translations section 

~ changed outdated NDK to latest (10), same with GCC [they are both backwards compatible]

~ smaller changes like typos and spelling

~ added missing projects alphabetically under Acknowledgements

~ Todo list updated and now it's a already done and todo list  -> x = already done [ ] todo (better look I think)


@ukanth please also update the readme's in the donate/master branches (thanks)