PARQUET-339: Add Alex Levenson to KEYS file
PARQUET-339: Add Alex Levenson to KEYS file

Author: Alex Levenson <alexlevenson@twitter.com>

Closes #245 from isnotinvain/alexlevenson/add-keys and squashes the following commits:

e3dae4d [Alex Levenson] Add Alex Levenson to KEYS file

nguyenvanthan/parquet-mr,cchang738/parquet-mr,jaltekruse/parquet-mr-1,SaintBacchus/parquet-mr,nitin2goyal/parquet-mr-1,winningsix/incubator-parquet-mr,SaintBacchus/parquet-mr,zhenxiao/parquet-mr,cchang738/parquet-mr,rdblue/parquet-mr,coughman/incubator-parquet-mr,saucam/incubator-parquet-mr,HyukjinKwon/parquet-mr-1,Zariel/parquet-mr,nezihyigitbasi-nflx/parquet-mr,DataDog/parquet-mr,laurentgo/parquet-mr,piyushnarang/parquet-mr,DataDog/parquet-mr,zhenxiao/parquet-mr,apache/parquet-mr,HyukjinKwon/parquet-mr,zhenxiao/parquet-mr,winningsix/incubator-parquet-mr,piyushnarang/parquet-mr,DataDog/parquet-mr,SinghAsDev/parquet-mr,sworisbreathing/parquet-mr,nitin2goyal/parquet-mr-1,nezihyigitbasi-nflx/parquet-mr,nitin2goyal/parquet-mr-1,sircodesalotOfTheRound/parquet-mr,Zariel/parquet-mr,jaltekruse/parquet-mr-1,jaltekruse/parquet-mr-1,saucam/incubator-parquet-mr,sircodesalotOfTheRound/parquet-mr,sworisbreathing/parquet-mr,rdblue/parquet-mr,apache/parquet-mr,nguyenvanthan/parquet-mr,coughman/incubator-parquet-mr,HyukjinKwon/parquet-mr,nguyenvanthan/parquet-mr,coughman/incubator-parquet-mr,winningsix/incubator-parquet-mr,sworisbreathing/parquet-mr,HyukjinKwon/parquet-mr-1,apache/parquet-mr,piyushnarang/parquet-mr,sircodesalotOfTheRound/parquet-mr,SinghAsDev/parquet-mr,laurentgo/parquet-mr,Zariel/parquet-mr,rdblue/parquet-mr,nezihyigitbasi-nflx/parquet-mr,saucam/incubator-parquet-mr,SinghAsDev/parquet-mr,HyukjinKwon/parquet-mr-1,SaintBacchus/parquet-mr,cchang738/parquet-mr,laurentgo/parquet-mr,HyukjinKwon/parquet-mr