Added more science examples

[itay-grudev]

Description:

Adds a list of generic science names that can be filtered like:

Faker::Science.science #=> "Space science"
Faker::Science.science(:natural, :applied) #=> "Engineering"
Faker::Science.science(:formal, :applied) #=> "Computer Science"

Adds a list of science modifiers words that can used like:

Faker::Science.modifier #=> "Quantum"
Faker::Science.modifier #=> "Superconductive"

Adds a list of science tools that can include modifiers to generate more diverse data, although not guaranteed to be real:

Faker::Science.tool #=> "Superconductive Microcentrifuge"
Faker::Science.tool #=> "Portable Cryostat"
Faker::Science.tool #=> "Quantum Spectrophotometer"
Faker::Science.tool(simple: true) #=> "Microcentrifuge"

[psibi]

Overall the changes LGTM except some minor comments. That being said, I would wait for someone else to review the Ruby API additions as I'm not the right person to review that.

[itay-grudev]

@psibi @koic Done.

[psibi]

Thank you!