[FEATURE] new command dev:module:model:method ...

... which reads all column names from a model related MySQL table and writes those column into the corresponding .php file.

File before:

![gs_01_before](https://cloud.githubusercontent.com/assets/372027/3792103/03ba7560-1b66-11e4-9798-b6e4cafc93dd.png)

File after:

![gs_02_after](https://cloud.githubusercontent.com/assets/372027/3792104/03bd164e-1b66-11e4-80fa-33f059244cc3.png)

Where the feature pays out:

![gs_03](https://cloud.githubusercontent.com/assets/372027/3792119/e24a4db4-1b66-11e4-9fd1-728a4d9298e6.png)

If something is weird let me know and I'll fix it.