Fix link to 'fifth leg of the tour' in 'Tour of Ceylon: Type aliases and type inference'

http://ceylon-lang.org/documentation/1.0/tour/typeinference/#member_class_aliases_and_class_alias_refinement
Merge pull request #267 from olivergondza/typeinference-link

Fix link to 'fifth leg of the tour' in 'Tour of Ceylon: Type aliases and type inference'
Typos in /documentation/1.0/tour/modules.md
update chapter on modularity, mention module.ceylon/package.ceylon
Merge pull request #268 from olivergondza/patch-1

Typos in /documentation/1.0/tour/modules.md
minor
fix url
Corrected minor typo
Merge pull request #269 from ragaller/master

Corrected minor typo
Fixed doc string of Identifiable
Merge pull request #270 from ragaller/master

Fixed doc string of Identifiable
Fix docstring of ConstrainedAnnotation.occurs
Merge pull request #271 from ragaller/master

Fix docstring of ConstrainedAnnotation.occurs