Pyhocon

* Return None instead of NoneValue when using items() method (roee-allegro) [196]
* Add context for changing default chars to avoid conflict with other dependencies using pyparsing (chunyang-wen) [195]

* Support conversion of numerically-index objects to arrays (a.1 = 4) (lune-sta) [189]
* Handle ConfigValues and ConfigSubstitution in HOCONConverter.to_hocon (ChristopheDuong) [192]
* Fix raising of ConfigException for get_int() and get_float() (ElkMonster) [188]
* Fixed Flake8 error for Python 2.7

* Fixed negative integer parsing [185]

* Fixed forbidden characters (sambible) [184]

* Fixed scientific notation parsing (chunyang-wen) [177]

* Escape backslash (roee-allegro) [173]
* Fixed incorrect config merge (aalba6675) [170]