Cache length in observesBefore for loop
[FEATURE ember-handlebars-compiler-ast-to-precompile] Allow precompile to accept an already existing Handlebars AST

[FEATURE pass-ast-to-precompile] Adding feature flags

[FEATURE pass-ast-to-precompile] Changing flag name
[BUGFIX] fillIn helper should take context into consideration
Merge pull request #5352 from teddyzeenny/fix-fillin

[BUGFIX] fillIn helper should take context into consideration
Merge pull request #5341 from chadhietala/pass-ast

[FEATURE pass-ast-to-precompile] Allow precompile to accept AST
Merge pull request #5350 from cibernox/fix_cache_length

Cache length in observesBefore for loop
Add missing tests for Ember.DAG

I am not sure sure hoy to tag fixing the absence of tests.
Merge pull request #5354 from cibernox/test_ember_dag

Add missing tests for Ember.DAG