Read BIF files

[Pierre Denis]

Lea should have a function to read BIF files (Bayesian Interchange Format).

Several BIF file examples, ranging from small to large BN's, are available here.

This should be helpful in particular for benchmarking Lea.

[Pierre Denis]

Add Lea.read_bif_file method and subsidiary methods (refs #61)

→ <<cset fc1018ec3b6d>>

[Pierre Denis]

Update Lea.read_bif_file method to return the created variable names (refs #61)

→ <<cset 40ea5c63adb3>>

[Pierre Denis]

Add test for read_bif_file method (refs #61)

→ <<cset 8eacda5f6aa4>>