[porcessors][m]: update meta for source file

[zelima]

• processor for updated source files as desired
• tests updated appropriately (source files moved into archive)
• another processor for deduplicating resources by name

This pull request fixes refs #93

Travis will fail until this one is merged https://github.com/datahq/planner/pull/30

[zelima]

Closing this as we are dealing all described above in assembler by introducing original source node