Extra problems

You guys are fast :)
Fix typos
Fix even more typos
I'm not lazy, this one is really good

It is!
Add a brief setup section
Say how to actually install the right version with rbenv
Add the boilerplate for the first task
Give resources links
Put a little hadycap in there
Add hashes problems
Add Hash#default
Add bang methods
Merge branch 'master' of https://github.com/HackBulgaria/Core-Ruby-1