Unify parameters into single configuration

[rjagerman]

Currently the code has several hard-coded parameters and timeouts that work well but should still be configurable. The main objective is to unify all parameters into a single default configuration.

Some examples:

• PullFSM.scala:25, Multiple arguments in the PullFSM constructor are hard-coded.
• PushFSM.scala:25, Multiple arguments int he PushFSM constructor are hard-coded.
• RowIterator.scala:15, Row iterator has a hard-coded block size