Fix covariant type resolution of numeric operations
Find bound/free variables
Add forward/backward traversal flag
merged graph node addition and edge connection into one method
Extract free variable using tree.freeTerm
Evaluate free variables then connect to the referencing node
Traverse Silk input of the referenced variables
Supress log messages
test function reference used as free val
Add pending mark
Fix k-means example. Add N/A exception
Removed context class from CallGraph builder
Add craft code of task evaluation
Simple evaluation
Extract common code for eval and evalSingle
Extracted a code for retrieving evaluated data
Working on flatMap evaluation
Use typeCheck to resolve types of free variables
make compact the code for finding free variables
Add settings for deplying tar.gz to the repository