bitlbee-steam-1.4.0

• Added cleaner debugging utilities
• Added Coverity support
• Added support for the NOCONFIGURE variable to the autogen.sh script
• Added the --enable-warnings option to the configure script
• Dropped the required GLib version to 2.28.0
• Fixed segfault when fetching aliases
• Fixed broken message queuing
• Fixed failing Steam Community requests
• Fixed libgcrypt not being properly initialized
• Fixed the game state not taking precedence over the away state
• Implemented self message support
• Implemented support for SteamGuard mobile 2FA
• Make Travis CI build against bitlbee's master branch
• Migrated to the newer OAuth chat history API
• Migrated OBS packaging to Travis CI
• Removed the --enable-debug option from the configure script
• Various code refactoring and restyling