Added the chance to declare Functions with variable number of arguments#42

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MFrancesco wants to merge 5 commits intofasseg:masterfrom MFrancesco:master

+260-20

Commits on May 28, 2015

Added the chance to declare Functions with variable number of arguments. Still need deep testing btw.
MFrancesco
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Fixed bug function with no argument and add new tests
marco moretti
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Commits on Jun 3, 2015

More test, everythinks works fine, asking for pull request
MFrancesco
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Commits on Jun 30, 2015

Added another test to verify an old issue is not occurring
MFrancesco
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Commits on Sep 17, 2015

Reintroduced the getNumArguments method in Function class not to break existing user code
MFrancesco
committed