#3 Simplify syntax

[Kiri Choi]

If the phrasedml string is given by:

phrasedml = '''
model1 = model "myModel"
sim1 = simulate uniform(0, 5, 100)
task1 = run sim1 on model1
plot time vs S1, S2
'''

support following notation as well for simplification:

phrasedml = '''
model1 = model "myModel"
task1 = run simulate uniform(0, 5, 100) on model1
plot time vs S1, S2
'''