2.1.0

Added

• -Wstrict-overflow=5 now used in default CFLAGS.
• Handling of TPM2_RC_CONTEXT_GAP on behalf of users.
• Convert TPM2_PT_CONTEXT_GAP_MAX response from lower layer to
  UINT32_MAX

Changed

• travis-ci now uses 'xenial' builder
• Significant refactoring of TCTI handling code.
• --install added to ACLOCAL_AMFLAGS to install aclocal required macros
  instead of using the default symlinks
• Launch dbus-run-session in the automake test environment to
  automagically set up a dbus session bus instance when one isn't present.

Fixed

• Bug caused by unloading of libtss2-tcti-tabrmd.so on dlclose. GLib
  does not support reloading a second time.
• Bug causing -fstack-protector-all to be used on systems with core
  libraries (i.e. libc) that do not support it. This caused failures at
  link-time.
• Unnecessary symbols from libtest utility library no longer included in
  TCTI library.