* add some tests with default capture on the two parameter template and some notes about it in the README.md
remove the test from visual studio 2015
vs2015 doesn't seem to properly deal with is_assignable in the cases we care about so make a standalone version that is more direct in what we are doing
add version to appveyor and add some notes to the readme
fix a few test cases to make sure code is covered and test a few other paths
remove unneeded enum streaming operator
add some diagnostic escapes around trait code to eliminate gcc Wnarrowing warnings
work specification of the template operations
remove optional add some templates for options conversions
add the two parameter template for add_option
* Fix some comments from Code review and add more description
* start work on trying to clean up the type traits for which lexical cast overload to use
* fix readme issue and make the condition tests a little clearer
* add a check for out of range errors on boolean conversions
* Fix capitalization and some comments on option functions
* Allow immediate_callback on the main app to run the main app callback prior to named subcommand callbacks, and reflect this change in the a new test and docs.
* add a is_tuple_like trait, and type_count structure for getting the number of elements to require
* add lexical conversion functions for tuples and other types
* remove the separate vector option and option function
* test out the type names for tuples
* add some more lexical conversion functions and test
* more work on tuples and tests
* fix some merge warnings
* fix some typename usage and c++14 only constructs
* tweak some of the template to remove undefined references
* add extra static assert about is_tuple_like
* fix some undefined references in clang
* move around some of the type_count templates to be used in the type_name functions
* move the type_count around and add some additional checks on the classification
* add some info to the readme
* add some tests with default capture on the two parameter template and some notes about it in the README.md
remove the test from visual studio 2015
vs2015 doesn't seem to properly deal with is_assignable in the cases we care about so make a standalone version that is more direct in what we are doing
add version to appveyor and add some notes to the readme
fix a few test cases to make sure code is covered and test a few other paths
remove unneeded enum streaming operator
add some diagnostic escapes around trait code to eliminate gcc Wnarrowing warnings
work specification of the template operations
remove optional add some templates for options conversions
add the two parameter template for add_option
* Fix some comments from Code review and add more description
* fix case when string_view doesn't work to append to a string.
* This PR also addressed #300
* modify lexical_cast to take const std::string &, instead of by value to allow string_view in a few cases
