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
diff --git a/KEYS b/KEYS
index d99427d..acdc698 100644
--- a/KEYS
+++ b/KEYS
@@ -338,3 +338,70 @@
 HT2hxY8ondF9eKU5rnzLGRFYmm1+Pw==
 =gSQT
 -----END PGP PUBLIC KEY BLOCK-----
+pub   2048R/2F7D7992 2014-03-20
+uid                  Alex Levenson <alexlevenson@twitter.com>
+sig 3        2F7D7992 2014-03-20  Alex Levenson <alexlevenson@twitter.com>
+sub   2048R/2D2E4D5C 2014-03-20
+sig          2F7D7992 2014-03-20  Alex Levenson <alexlevenson@twitter.com>
+
+pub   2048R/7C58F0FE 2015-01-08
+uid                  Alex Levenson <alex@isnotinvain.com>
+sig 3        7C58F0FE 2015-01-08  Alex Levenson <alex@isnotinvain.com>
+sub   2048R/E17552B7 2015-01-08
+sig          7C58F0FE 2015-01-08  Alex Levenson <alex@isnotinvain.com>
+
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