Path settings support

I have added path settings to project properties.

![nb-yii-plugin-path-settings-support](https://f.cloud.github.com/assets/738383/730846/a8a77c54-e25e-11e2-976e-fd1da0c1f985.png)

#### Usage
Please set relative path from source directory.
e.g.
Please set `protected/myext` to `ext:` if extensions directory is the following:

```
myproject
├─protected
│  └─myext (extensions directory)
├─...
```

If you want to use default directory, please set empty.
e.g. 
`application:` myprotected
`controllers:` (empty)
`views:` (empty)

controllers directory means myprotected/controllers. views directory means myprotected/views.

#### NBM for testing


#### Notice
This is development version yet. 
So, If you have some problems, please let me know.
If I find important problem, this feature will be not added.

#### Related issues
- #18 
- #19 
- #22
- #32 
- #35 

#### Adding version number
0.6.0