Heavily corrected and slightly expanded version

Functional

• Fixed bugs in some cases;
• Added the ability to automatically output unknown arguments from a lambda function:

# lambda function
(~ {
    dbl <- x * 2
    trpl <- y * 3
    return (dbl + trpl)
})
# is equivalent of
function(x, y) {
    dbl <- x * 2
    trpl <- y * 3
    return (dbl + trpl)
}

• Added dataframe support for functional stuff;
• Some bugs fixed;
• Package warnings fixed.