v2.7.19: Fix issue #445 by add more packet space for NNE

Merge pull request #445 from bobvawter/fix_nne_size

go-ora/v2/network: Reserve additional packet space for NNE

v2.7.18: Update code for OracleDriver + add support for Charset ID 846

update readme file

v2.7.17: Add Function WrapRefCursor

fix bugs in string_converstion.go
also update readme file

v2.7.16: read TTC code 28 + fix decoding number issues

fix decode number to float64 and int64 issues

v2.7.15: log packet decrypted + disable timeout when value is 0

1- modify packet logging so packet is readable if the connection using encryption
2- global timeout can be disabled if its value is 0

v2.7.14: fix driver.Valuer that return nil + fix float values return as string

fix driver.Valuer that return nil
fix float values return as string

v2.7.13: update documentation and set default timeout to 120 seconds

update documentation and set

v2.7.12: fix datetime issues

update readme file

v2.7.11: Add Support for DBMS_OUTPUT

fix when passing on output parameter will give ttc buffer error

v2.7.10: fix issues related to UDT and its array

fix reading large object array