Website type improvements: allow multiple websites in Profiles, respect default type and update type options

1. Allow a profile to contain > 1 website field with the Website Type defined for each instance.

2. When editing a contact and adding a new Website instance, check if is_default has been assigned to the website_type option values - and if so select that option by default in the dropdown field (full edit form or inline edit from contact summary).

3. Modify website_type options in meta-data for new installs. 'Home' should be removed. The options should be:

Work (is_default)
Main
Facebook
Google+
Instagram
LinkedIn
MySpace
Pinterest
SnapChat
Tumblr
Twitter
Vine

4. Upgrade website_type option values to add the following. Check if_exists for each using case-insensitive match before insert.
Google+
Instagram
LinkedIn
Pinterest
SnapChat
Tumblr
Vine

More discussion at:
http://forum.civicrm.org/index.php/topic,31928.0.html

— Original post ----------
The Website field has many options: Home, Work, Facebook, Main, etc.

It always defaults to Home when added to a profile, even if this is not appropriate for the contents of the profile (such as a business profile where "Work" or "Main" would be more appropriate).

Suggestion:

1. Allow us as admin to select which type of website it is in the profile, and if none is pre-selected, then have the user select.
2. Allow us to add multiple 'website' fields to a profile, so that we may collect both "home website" and "facebook website" in the same profile. This is a reasonable use case.