fix lookup for SSAValues in foreigncalls and quote the library if it is a symbol

[KristofferC]

Fixes #220

julia> @interpret CSV.read("../SampleCSVFile_11kb.csv")
99×10 DataFrames.DataFrame. Omitted printing of 7 columns
│ Row │ 1      │ Eldon Base for stackable storage shelf, platinum                                   │ Muhammed MacIntyre │
│     │ Int64⍰ │ Union{Missing, String}                                                             │ String⍰            │
├─────┼────────┼────────────────────────────────────────────────────────────────────────────────────┼────────────────────┤
│ 1   │ 2      │ 1.7 Cubic Foot Compact "Cube" Office Refrigerators                                 │ Barry French       │
│ 2   │ 3      │ Cardinal Slant-D\xae Ring Binder, Heavy Gauge Vinyl                                │ Barry French       │
│ 3   │ 4      │ R380                                                                               │ Clay Rozendal      │
│ 4   │ 5      │ Holmes HEPA Air Purifier                                                           │ Carlos Soltero     │
│ 5   │ 6      │ G.E. Longer-Life Indoor Recessed Floodlight Bulbs                                  │ Carlos Soltero     │
│ 6   │ 7      │ Angle-D Binders with Locking Rings, Label Holders                                  │ Carl Jackson       │
│ 7   │ 8      │ SAFCO Mobile Desk Side File, Wire Frame                                            │ Carl Jackson       │

Not sure how to test this but I'll figure something out,

[KristofferC]

Should have run the tests locally :P

[timholy]

Hah, collision. See teh/fix_220. (Sorry, I thought you were focused on #206.) Do what you will, I'm incommunicado for the next couple hours.

[KristofferC]

Heh, I was converging to your solution now.