[patch] Exclude parameters and miscellaneous enhancements for bp_has_profile()

[boonebgorges]

This patch adds several additional parameters to bp_has_profile():

• 'exclude_groups' allows you to specify profile groups to exclude
• 'exclude_fields' allows you to specify profile fields to exclude

You can use the two together to nicely customize your profile loop.

In addition, I noticed that BP_XProfile_Group::get() takes a couple of potentially helpful parameters that were, for some reason, not available to the loop. So I moved them upstream. In particular, bp_has_profile() now also accepts:

• 'fetch_fields'
• 'fetch_field_data'
• 'hide_empty_groups'

I know that it'll be helpful to me, at least, to have these available to the loop in the future.

[boonebgorges]

(In [3381]) Adds several exclude parameters to bp_has_profile(). Fixes #2655