fix(tabset): preserve tabset class attribute

[ghost]

this should fix #581

[pkozlowski-opensource]

@ajoslin what do you think about this approach?

Personally I was more in favor of doing something like in aaa8d81
I kind of don't like how we privilege one attribute.

[ghost]

I think this is more convenient for user to specify same class attribute as twitter bootstrap uses. Thus user of angular-bootstrap shouldn`t learn specific attributes of tabset directive. But this is only my opinion.

[pkozlowski-opensource]

@bk1te @ajoslin is a master here so I will let him decide.

Just few notes here:

• we are re-defining HTML vocabulary with those tags anyway so we need to assume that people knowing only Bootstrap CSS / HTML will have to learn new syntax anyway
• we want to be CSS framework agnostic in a longer run

[ajoslin]

looks good to me :-)

Allowing css classes on the tabset is definitely a good thing to have. I'll merge it in a few minutes

[bekos]

@ajoslin @pkozlowski-opensource I think you can add replace: true for the tabset directive, and this might work.
Didn;t have time to test, but I can do if you wait, before merging this one.

[bekos]

OK. Tests don't fail and demo works fine if we do <tabset class="tabs-left">.
@ajoslin Do you agree on this approach?

[ajoslin]

Yeah. You're right.

[ajoslin]

Fixed in 8868f23, did the replace method instead. Thanks @bk1te for bringing this issue up :-)

[ghost]

thnks for resolving this issue