Merge branch 'mbedtls-1.3' into development

* mbedtls-1.3:
  Fix typos in Changelog
  Fix macro name from wrong branch
  Fix bug in pk_parse_key()
  Fixed typos
  Updated Travis CI config for mbedtls project

Conflicts:
	include/mbedtls/ecp.h
	include/polarssl/compat-1.2.h
	include/polarssl/openssl.h
	include/polarssl/platform.h
	library/pkparse.c
	programs/pkey/mpi_demo.c