Add new nette tester options

[hanisko]

Q	A
Branch	master
Bug fix?	no
New feature?	yes
BC breaks?	no
Deprecations?	no
Documented?	yes
Fixed tickets	no

added new nette tester config options

• php_ini_configuration_path documentation
• default_php_ini_configuration documentation

[veewee]

Thanks for the PR. It looks like you still have a coding-style issue. Can you fix it?

[veewee]

Thanks!