Fixed non-functional plugin generation taking this gem from github

Also small readme fixes

Conflicts:
	lib/open_project/plugins/engine.rb
	openproject-plugins.gemspec

doc/CHANGELOG.md

@@ -15,6 +15,8 @@ See doc/COPYRIGHT.md for more details.
 
 # Changelog
 
+* Fixed non-functional plugin generation when this gem is taken from github directly
+
 ## 1.0.6
 
 * Allows plugin register to receive a block so plugins don't have to register with this plugin AND Redmine::Plugin

lib/generators/open_project/plugin/templates/%full_name%.gemspec.tt

@@ -16,5 +16,5 @@ Gem::Specification.new do |s|
   s.files = Dir["{app,config,db,lib}/**/*"] + %w(CHANGELOG.md README.md)
 
   s.add_dependency "rails", "~> 3.2.14"
-  s.add_dependency "openproject-plugins", "~> <%= OpenProject::Plugins::VERSION %>"
+  s.add_dependency "openproject-plugins", "~> <%= Bundler.environment.specs["openproject-plugins"].first.version.to_s %>"
 end

lib/generators/open_project/plugin/templates/README.md.tt

@@ -4,4 +4,4 @@ FIXME Add description and check issue tracker link below
 
 ## Issue Tracker
 
-https://www.openproject.org/projects/<%= plugin_name.gsub('_','-') %>/issues
+https://www.openproject.org/projects/<%= plugin_name.gsub('_','-') %>/work_packages