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*****  Change Log  *****
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VERSION 0.3, 8/18/2009
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1) CHANGED: lots of bugs fixed.
2) CHANGED: new (and clearer) definitions of various delays, refer to manual.
3) CHANGED: exploit parallelism criterion corrected, now it is: PLAT(N_i)-RPLAT(N_i) <>  PLAT(N_i+1)-RPLAT(N_i+1). Refer to manual for details.
4) ADDED: for undefined parameters such as # of interations, will prompt user for input at the beginning. see "renderUndefinedParams" method.
5) ADDED: use "taintDelay" to remember the delays already calculated in order to save time.
6) ADDED simulation functions: can sweep parameters such as # of iterations, basic latencies.
7) ADDED: file manipulation. Parse the input file, change some latencies according to some condition and write to an output file.
8) ADDED: get component's latency contribution and sensitivity.
9) ADDED: AltDesign to support fidelity-compromising transformations.
10) ADDED: remember the last/save open directory.
11) CHANGED: file format. For edges, last item is ID of a portCell not mnemonic name. IDs are better than mnemonics because they are unique.
12) CHANGED: concept. Ports having the same name = dependency across iterations
13) ADDED: copy/cut/paste.
14) ADDED "change (globally) parameters": change attributes of cell by matching its name
15) ADDED"print all cell types": an overview of cells inventory