Ignore html directory in git

Html contains doc that we don't want to store in the repository now.
Use require_relative in lib/lucie.rb

lucie-lib/lib/lucie.rb used the files from the installed gem instead of the current version. The tests were okay because we set the include path in Rakefile but if you had wanted to use it from lucie-bin it showed strange behavior.
Finding method of the controller should use syms.

Convert the action to symbol when look for the method in a controller. It can be string and include? returns false in this case.