bump libuv
Merge pull request #425 from rjemanuele/libuv_upgrade

bump libuv
Add missing command to the build instructions in the README.
Map armv6l host architecture to arm.
Use startswith approach so it also catches other versions of architecture.
Merge pull request #428 from Kami/arm_build_fixes

Fixes for ARM build
Merge pull request #427 from Kami/update_readme_build_instructions

Add missing command to the build instructions in the README
Update openssl submodule to include arm changes.