Remove breadcrumb styles

[Bidthedog]

The default styles defined here currently override the bootstrap defaults, therefore the allowBootstrap directive doesn't work consistently - i.e. <breadcrumb [allowBootstrap]="true"></breadcrumb> results in this:

Instead of this (the bootstrap default):

i.e. an enforced white background (regardless of the allowBootstrap directive) and overridden padding / margins.

Suggest removing all bootstrap overrides when allowBootstrap is true and let the implementer override bootstrap styles if they wish.

[hggeorgiev]

@Taulantdisha