Merge pull request #26 from locochris/gt_lt_bugfix

Gt lt bugfix
Merge pull request #33 from locochris/add_changelog

Add CHANGELOG
Add it blocks

Instead of writing:
```bash
it "assert equal $((1+1)) 2"
  assert equals $((1+1)) 2
```

write:
```bash
it <<-'EOF'
  assert equal $((1+1)) 2
EOF
```