[languages/PIR] add command line options to specify the kind of output:    - parse only (used for tests currently)    - PAST    - PIR    - parse and dump parse tree.
[languages/PIR]
add command line options to specify the kind of output:
   - parse only (used for tests currently)
   - PAST
   - PIR
   - parse and dump parse tree.

Courtesy of Klaas Jan Stol.


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@16956 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

fernandobrito/parrot,gagern/parrot,tewk/parrot-select,tewk/parrot-select,FROGGS/parrot,FROGGS/parrot,fernandobrito/parrot,gitster/parrot,gagern/parrot,tewk/parrot-select,tewk/parrot-select,fernandobrito/parrot,youprofit/parrot,parrot/parrot,youprofit/parrot,youprofit/parrot,gitster/parrot,FROGGS/parrot,youprofit/parrot,tkob/parrot,tkob/parrot,tkob/parrot,tkob/parrot,FROGGS/parrot,tkob/parrot,gitster/parrot,fernandobrito/parrot,tewk/parrot-select,tkob/parrot,tkob/parrot,gitster/parrot,FROGGS/parrot,parrot/parrot,tewk/parrot-select,parrot/parrot,youprofit/parrot,FROGGS/parrot,FROGGS/parrot,tkob/parrot,FROGGS/parrot,gagern/parrot,gitster/parrot,gagern/parrot,fernandobrito/parrot,gitster/parrot,parrot/parrot,gagern/parrot,tewk/parrot-select,fernandobrito/parrot,gagern/parrot,gitster/parrot,gagern/parrot,fernandobrito/parrot,parrot/parrot,youprofit/parrot,youprofit/parrot,youprofit/parrot