Everything is better with glob()

Now you may use file pattern in `$this->taskConcat()`. For example:
```
$this->taskConcat([
'./public/angular/app/controllers/*',
'./public/angular/app/directives/*'
])
```
Merge pull request #29 from slider23/patch-1

Everything is better with glob()
GenMarkDownTask improvements
Merge branch 'master' of github.com:Codegyre/Robo