Version 1.6.0

Notable changes:

• Two new platforms - nacl and surfaceless

• New attribute - WAFFLE_CONTEXT_ROBUST_ACCESS

• New API

  • waffle_teardown
  • waffle_get_current_display
  • waffle_get_current_window
  • waffle_get_current_context
  • waffle_get_current_display

• Deprecated API

  • waffle_attrib_list_*

• wflinfo - JSON output

• GBM - modifiers support

• Unit test improvements

• Additional build system - meson