Add missing links

Hello,

Here is a unsorted and chaotic list of resources. We might want to add them one by one to awesome-linq. I didn't check them so feel free to do it. It is a great way to start to contribute to awesome-linq. Remember to read the [contributing rules](https://github.com/aloisdg/awesome-linq/blob/master/CONTRIBUTING.md) before. Thank you for you help!

https://github.com/themotleyfool/Lucene.Net.Linq
https://github.com/CenturyLinkCloud/ElasticLINQ
https://github.com/paulcbetts/LinqToAwait
https://github.com/nbasakuragi/LINQBridgeVs
https://github.com/svick/LINQ-to-Wiki
https://github.com/nessos/LinqOptimizer
https://github.com/esskar/Serialize.Linq

extender
https://github.com/mehfuzh/LinqExtender

for .net 2.0
https://github.com/SaroTasciyan/LINQlone