Merge branch 'release/0.4.0'
Merge branch 'release/0.5.0'
no need to keep managed source under the unmanaged source dir
use sbt to generate sources
Added bijection-avro module which provide various avro based injections
added Date classes

date classes to support joda time and other date conversions.
added correct import statement for jodatime
updated Guava to version 14.0. Added bijections for Base16, Base32, Base32HEX, Base64, Base64Url
Merge branch 'master' of https://github.com/twitter/bijection into develop
Merge branch 'release/0.5.1'
Merge branch 'release/0.5.2'
remove attempt
re-add type
add missing import
changed Avro Json Injection to [T,String] from [T,Array[Bytes]]
updated the property description to String from Array[Byte]
Merge pull request #128 from softprops/sbt_codegen

Sbt codegen
Merge pull request #133 from twitter/feature/remove_attempt

Remove redundant Attempt (in favor of scala.util.Try)
updated code to use Attempt
removed some bijections