Attempt to fix issue with default outfit icon on Mac

Changed default outfit icon

Сhanging default photo for outfit

 1) added GroupNotice notification type and tab "Group" for it;
 2) added Attachment field to group notice notifications which may contain inventory offers, notecards,  etc;
 3) added Fee field to Group Invite notifications;
 4) added notification resize depending on attachment field.

 1) stripped off attachment field;
 2) made logos (group's, sender's, etc) in expanded view the same size as in condensed view;
 3) turned on notification showing upon click;
 4) fixed cropped right border of Invite and Transactions notifications;
 5) enabled "Collapse All" button;
 6) stripped off unnecessary icons.

 - minor fix: added large incoming payment icon

 - introduced expanded notification view and general condense/expand behaviour
   for all types of notifications

- introduced different design for System, Incoming/Outcoming Transactions, Invites

Works:
1) All new notices shown on "Invites" tab of new floater "NOTIFICATIONS TABBED" in condensed view
To be done:
1) Show other types of notices, like transactions and system
2) Separate notices between tabs "Invites", "System", "Transactions"
3) Design full notice view (in addition to condensed view)

With the updated PNG library (1.6.8), we're getting stderr warnings about
non-conformance issues with images in the build.  These warnings include:

  * iCCP: known incorrect sRGB profile
  * iCCP: profile 'ICC Profile': 1000000h: invalid rendering intent
  * iCCP: cHRM chunk does not match sRGB

These were normalized by running an ImageMagick 'convert -strip' pass
over each PNG image.  'compare -metric AE' reports 0 delta for all
before/after pairs.

Added LLExperienceHandler to handle experience links
Updated LLSidepanelItemInfo to use profile links

ACME-497 : Clean up the xml code for checkin to use a proper icon widget and add a decent default image for it

ACME-453, ACME-455, ACME-456, ACME-465 : Duplicate and tweak the Snapshot Profile UI to create the Snapshot Facebook UI

ACME-340 Get facebook icon from spec and add to viewer: Added a facebook icon and the icon appears only for the 'Invite people you know to SL' tab.

NORSPEC-51 Fix for Incorrect Texture icon used in build tool when normal or specular map is not set to 'Use Texture'