How to install: (require OCaml 3.12 or higher)
  Run make in this directory
  
How to execute:

  The binary "align" is created in the directory matching_standalone.
  It takes three arguments, two input directories followed by the output directory.
  The input directories should contain theorems and optionally constants definitions 
  and type defintions in the TPTP THF or (our internal tt format) format.
  The output directory will contains the list of matched constants (subterms) 
  and statements.

  Example: 
  ./align --help
  ./align libraries/hol4 libraries/hollight align_hol4_hollight_st -s -t
  ./align libraries/hol4 libraries/hollight align_hol4_hollight_stidgc -s -t -i -d -g -c
  
We provide a formatted version of some proof assistant libraries:
  HOL Light: 225
  HOL4: Kananaskis10
  Mizar: 9.1.03_5.29.1227
  Matita: 0.5.3-1
  Coq: 8.5
  Isabelle/HOL: 2016
  
The export directory contains the files necessary to re-export the libraries
from the provers to our internal format.
