Bug fix and some new features

A very annoying bug is fixed where the bot would stop working after a certain amount of time because of insensible defaults. I've added more sensible defaults now and it should not happen in the future anymore. There are also new features added:

• Send a chat action
• Send a contact
• The InlineKeyboardMarkup is available as markup

I decided to do this release because of the annoying bug which should be fixed, the next release will not be long after this one and will include all other markups.