! Document MSSQL stored procedure call support [doc,mssql]

! Warning on #pragma once in the main file

  Doesn't seem like there is a clean way to disable this warning in GCC
  (e.g., no access to the GCC's data structures to override the handler
  or some such).

  The only feasible idea so far is to filter the diagnostics.

- Document character encoding used to return text for each database [doc]

! Copyright update [doc]

- Add noexcept to move construction and assignment [c++11]

  Without noexcept some code (e.g., swap()) may have to resorts to copy.

! Command Line Tools required for ODB binary package on Mac OS [macosx]

  It seems without them there are no standard headers in /usr/include. Need
  to test and document.

! Private GCC in Mac OS ODB binary crashes on Yosemite [macosx]

  The symptom is:

  odb: error: unable to extract profile paths

  See email from <axel50397@gmail.com>/23-Oct-2014.