Add Romanian language to a list of supported languages

[vladimarius]

Below is the output of python test_all.py quality ; python test_all.py benchmark command:

quality:
en  bad: 115/400
pl  bad: 23/40
tr  bad: 10/27
ru  bad: 1/10
ro  bad: 6/14
uk  bad: 6/12
es  bad: 6/18
pt  bad: 7/13
el  bad: 26/66
cs  bad: 44/170
it  bad: 7/33
fr  bad: 19/30
vi  bad: 53/64

benchmarks:
english sentences        0.096s    bad: 0/3
english sentences fast   0.000s    bad: 1/3
spanish words            0.429s    bad: 6/18
italian words            0.267s    bad: 7/33
french words             0.542s    bad: 19/30