hi ITN: add math operations and telephone extensions

[mayuris-00]

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[mgrafu]

would it make sense to add these test cases?

चालीस पचास~४० ५०
साठ सत्तर~६० ७०
पचास पचास~५० ५०
पैंतीस पैंतालीस~३५ ४५
सत्तर अस्सी~७० ८०
अस्सी नब्बे~८० ९०
नब्बे पचास~९० ५०
चालीस पचास साठ~४० ५० ६०
पचास साठ सत्तर~५० ६० ७०
चालीस पचास साठ सत्तर~४० ५० ६० ७०
वहाँ चालीस पचास लोग थे~वहाँ ४० ५० लोग थे
स्कोर साठ सत्तर रहा~स्कोर ६० ७० रहा
अस्सी नब्बे प्रतिशत~८० ९० प्रतिशत
उसकी उम्र पैंतीस चालीस साल है~उसकी उम्र ३५ ४० yr है
नौ आठ सात छह~९८७६
इक्यासी दस इकसठ सड़सठ शून्य आठ~८११०६१६७०८

[mayuris-00]

Only the last two look like telephone cases to me, and both are already in the file. The rest read as cardinal, or measure in the case of उसकी उम्र पैंतीस चालीस साल है~उसकी उम्र ३५ ४० yr है, since nothing in their expected output is phone shaped. Shall I move them to test_cases_cardinal.txt and test_cases_measure.txt?

[mgrafu]

let's drop the last two, add the yr one to measures and the rest to cardinals. they might still fail because of the telephone logic!