[elpa] externals/xelb updated (6656f4d -> b700406)

[Chris Feng]

ch11ng pushed a change to branch externals/xelb.

      from  6656f4d   Revisit event cache timely
       new  e6d814b   Print log output to an XELB-specific messages buffer
       new  fbc2842   * xcb-types.el (slot-unbound): Correct mistyped message
       new  643cb9c   * xcb.el (xcb:-cache-request): Avoid logging large objects
       new  b60a1d0   Print backtrace upon event listener errors
       new  501a95d   Command for toggling debugging output
       new  7758613   ; Minor fixes for Calvo's patch set.
       new  b700406   Merge branch 'medranocalvo/xcb-logging' into 
externals/xelb


Summary of changes:
 xcb-debug.el | 110 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 xcb-types.el |  46 ++++++++++++++++++-------
 xcb.el       |   7 ++--
 3 files changed, 147 insertions(+), 16 deletions(-)
 create mode 100644 xcb-debug.el