Fix namespace for HTTP::Handler in pipeline.cr

Update the name for the middleware

Update shard.yml

Add version to the exception_page shard

Update README.md

Update shard.yml

Upadte the confusing import of OpenSSL and rename the compile time flag

Update shard.yml

Remove downcase calls for method names

Add more exceptions just to be a bit more user friendly, update the v…

…ersion in the shard, remove dead code from dsl module