Check 0.11.0

This release of Check adds several new macros for comparing different types of data, as well as bug fixes and other improvements.

Changes:

• Avoid issue in unit test output checking where a shell's built-in printf
  command does not work properly, but the printf program itself is correct.
• Emit only valid XML characters in XML logging (assumes ASCII encoding).
  Bug #103
• Add LGPL header to files where it was missing; update FSF address in LGPL headers
  Bug #110
• Strip timestamps from examples using filterdiff if available. This
  allow build output to be reproducible.
  Bug #112
• Use double slash for regular expressions in checkmk for better Solaris support.
• Improve CMake build files for better Visual Studio 2015 support.
  Pull Request #19
• Fix potential SIGSEGV in Check related to the disk filling up during a test.
  Pull Request #21
• Support added for applying tags to test cases and selectively running
  test cases based on tags.
  Pull Request #44
• Macros for comparing memory regions (ck_assert_mem_eq, ck_assert_mem_ne)
  have been added.
  Pull Request #64
• Macros for comparing floating point numbers have been added.
  Pull Request #69
• Macros for comparing string, but allowing for NULL (ck_assert_pstr_eq,
  ck_assert_pstr_ne) have been added.
  Pull Request #80
• Macros for checking if a pointer is NULL or not have been added.
  Pull Request #87