Simplify build instructions
Update OS X build instructions

Update OpenSSL version
Homebrew is now the preferred dependancy manager
Replace HexBits with strprintf
Add note about PPA to build instructions
Merge pull request #4435

92ddf2c Update OS X build instructions (Michael Ford)
Merge pull request #4422

645d497 Replace HexBits with strprintf (jtimon)
Merge pull request #4418

d618965 Add note about PPA to build instructions (Drak)
e5f0247 Simplify build instructions (Drak)