added gemspec file
added executable in bin dir
added empty main lib file bookkee.rb
moved ruby source files to lib dir
moved spec files to spec dir
moved code from main.rb to lib dir main file
added Rakefile with (default) rspec task
moved grammar file to doc dir
removed features dir from gemspec
changed relative dir path (./) to bookkee dir path in require clauses in all rb files
corrected specs, it needes implementation but it now it works (through rake task) at least
moved config.yaml to dedicated conf/ directory, added that dir to load path in gemspec; adjusted importer.rb to load that configuration file
added *.gem (gem itself) to gitignore
gem tuned up for normal shell execution
Merge branch 'feat/app-structure' into feat/transaction-tagging