cli controller additions

added the following methods:

• \flat\core\cli::enum_flag()
• \flat\core\cli::enum_optval()

config lib updates: inline string references

a (string) config value in a .php config file (which are obtained with the \flat\core\config::get() method) can make inline references to one or more config values from a .json file by using the following format in the php file's config value: <%CONFIG-REF-STRING::json_file_basename.property_name%>

for example:

• if a file named my_localizations.json (in the root of the config dir) had the following contents:

  {
     "my_localized_key" : "a localized value"
  }

• and a file name my_settings.php (in the root of the config dir) had the following contents:

  $config['some_key'] = "a-start-of-some-config-value:<%CONFIG-REF-STRING::my_localizations.my_localized_key%>, some-other-part-of-some-config-value";
  return $config;

• the following PHP code...

  echo \flat\core\config::get('my_settings/some_key');

• would display...

  a-start-of-some-config-value:a localized value, some-other-part-of-some-config-value

  (the sub-string a localized value has replaced the <%CONFIG-REF-STRING::my_localizations.my_localized_key%> sub-string of the original config value)

config lib updates

• ability to get config values from a .json file with the \flat\core\config::get_ref() method
• a config value in a .php config file (which are obtained with the \flat\core\config::get() method) can refer to a config value from a .json file by making it's value in the .php config file a string with the following format: CONFIG-REF::json_file_basename.property_name

php 7.2 is now required

bump PHP version to 7.2 in composer.json

bump copyright year README.md et. al

packagist instists on new weird values for GPL license

v1.3.0

packagist instists on new weird values for GPL license

v1.2.9

packagist is now very picky about what it allows in composer license tags

more api response objects

v1.2.8

Create method_not_allowed.php

session handler fixes

v1.2.7

retry session start loop

cli compatibility fixes

removed a potentially flawed terminal console width detection

holiday wrapper fixes

fixes to the holiday wrapper