proxy authentication support

pid is replaced back

Merge pull request #177 from erlangbureau/stage

clean up decode

Update jamdb_oracle.ex

Merge pull request #141 from erlangbureau/stage

fix in operator

Merge pull request #130 from erlangbureau/stage

fix ecto.migrate

Merge pull request #110 from erlangbureau/stage

Bump to 0.5.0

Update jamdb_oracle_query.ex

parameter description

Update jamdb_oracle_ecto.ex