Combine foreign imports with same signature. Does not produce short names

[serprex]

Two directions on compression:

Create a huffman table from the current set of functions & then rewrite getDynName to output the compression in base-53

Create the list of signatures before printing commands. Pass list to showCommand. Name the functions dyn1, dyn2, dyn3, etc

[svenpanne]

Nice, this already cuts down Functions.hs by 300kB and 9k lines. I think I'll land this and do 2 things:

• Do a pass over all API entries first to collect all compactSignatures and map them to short names like dyn42, dyn9 etc. later. This will cut down the names considerably, they're currently up to 122 characters long.
• Write this the foreign imports into a separate module, perhaps this helps with GHC's memory usage some people are complaining about.

Slowly the OpenGLRaw and gl packages converge more and more... :wink: