Accept varargs in Parsimmon.seq()

The common case for seq is to pass a fixed number of parsers, so using
varargs rather than an explicit array is syntactically cleaner (as
well as less surprising IMHO).  I've kept the previous
array-as-first-arg behavior for backwards compatability.
Alternatively, that could be removed and anyone wishing to pass a
variable number of args can do:

seq.apply(null, [args])
use node -p in the makefile

instead of console.log
package the commonjs file in the npm package
use pjs 5.x
v0.2.1
make alt take varargs as well
Merge branch 'feature.varargs'
v0.3.0
add the browser files to the npm package
v0.3.1