Release of v0.5.0

version 0.5.0:

• swtpm:
  • Write files atomically using a temp file and then renaming
• swtpm_setup:
  • Removed remaining 'c' wrapper program
  • Do not truncate logfile when testing write-access (regression)
  • Remove TPM state file in case error occurred
• swtpm-localca:
  • Rewrite in python
  • Allow passing pkcs11 PIN using signingkey_password
  • Allow passing environment variables needed for pkcs11 modules using
    swtpm-localca.conf and format 'env:VARNAME=VALUE'.
• build-sys:
  • Add python-install and python-uninstall targets
  • Add configure option to disable installation of Python module
  • Use -Wl,-z,relro and -Wl,-z,now only when linking (clang)
  • Use AC_LINK_IFELSE to check whether support for hardening flags