use new language features: inline object/if expressions
Merge branch 'master' into inline
inline isExists() function
Merge branch 'master' into inline
minor changes
eliminate use of variable
use inline object/if + misc cleanups
use if/else expression
fix strings
fill in TODO string
Conflicts:
	src/ceylon/language/Iterable.ceylon
Merge branch 'master' into inline

Conflicts:
	src/ceylon/language/Iterable.ceylon
minor refactors
Merge branch 'master' into inline

Conflicts:
	src/ceylon/language/Iterable.ceylon
	src/ceylon/language/forItem.ceylon
	src/ceylon/language/forKey.ceylon
minor
various minor
use more let