Update Modules.md
Comment syntax for plugins file. Fixes #1190.
fix F.Option.toArray

* old Implementation __ALWAYS THROWS ClassCastException__
* Java is not Scala. can not use [ClassTag](https://github.com/scala/scala/blob/v2.10.2/src/library/scala/collection/GenTraversableOnce.scala#L479). [java.util.Collection#toArray](http://bit.ly/ZGwS1m) return type __SHOULD NOT__ override. can not create generic array in runtime.
* It should preserve the contracts of Collection#toArray. see javadoc http://bit.ly/11vSnzE
Change the select to support multiple
In toHtmlArgs when the value is None only write the symbol
Fixed incorrect error filtering when getting Last-Modified from jar resources.

JarEntry#getTime returns -1 if the modification time is not specified (not 0).
Refactored the handling of Last-Modified.

It doesn't need to specify the path to the entry.
It is more simple to get the entry from JarURLConnection directly.
Fixed missing last-modified header in Test and Dev.
Merge pull request #1205 from Timshel/wip-multiselect

Change the select to support multiple
Merge pull request #1198 from xuwei-k/fix-option-toArray

fix F.Option.toArray
Merge pull request #1256 from tototoshi/fix-assets-last-modified

 Fixed incorrect error filtering when getting Last-Modified from jar resources.
Merge pull request #1191 from gmethvin/plugins_comments

Comment syntax for plugins file. Fixes #1190.
Merge pull request #1178 from ranierivalenca/patch-4

Update Modules.md