Add resources iteration

[deinok]

This enables the feature of do

dataset.addResource(new CkanResource(foo),new CkanResource(foo));

Some warnings fixed like ArrayList() to ArrayList<>()

[DavidLeoni]

Thanks!

Some points:

• Could you please break up the pull request into two separate ones, one for adders methods and the other for linting?
• the second commit diff shows a lot of changed lines, so I'm wondering if some reformatting provoked more changes than necessary. To keep formatting consistent, for Jackan we use tod-eclipse-format-style.xml (see instructions for setup in Eclipse). Could you try using that format style? I hope it can be loaded also by your favourite IDE.
• I see many hashcode and equals have been changed, going from

 if (obj == null) {     
    return false;       
 }

to

 if (o == null) return false;`  

I would prefer to keep original format, because actually other linters can like it more.

[deinok]

@DavidLeoni thanks for the quick response

• I will close this, and do 2 PR
• I will use Eclipse in next PR, i was using IntelliJ, if IntelliJ support syle.xml i will use it.
• Equals and HashCode, i will use your style. Also I think that every Class in models shoud have Equals an HashCode, are you ok?

[deinok]

@DavidLeoni Is Eclipse the default IDE for this project?

[DavidLeoni]

I will use Eclipse in next PR, i was using IntelliJ, if IntelliJ support syle.xml i will use it.

Eclipse is the main IDE for Jackan. Next in line for support is Netbeans. Seems like IntelliJ allows using Eclipse style natively and also with a plugin, if one of them works for you let me know and I will update the wiki.

Equals and HashCode, i will use your style. Also I think that every Class in models shoud have Equals an HashCode, are you ok?

ok! So far I tried to keep the model lightweight but we can start adding some bells and whistles. If you want to add the equals and hashcodes please make a separate pull request just for them.