* Getting a bit closer to Version 1.7
* Check and fix for deleting an option pointer directly that is also a help option. It is not common, but could be done
* Clear up Wshadow warnings from gcc 4.9. Most of these were local variable names with the same name as a member function.
Also a few spelling fixes and adding some std::move around some of the arguments when appropriate.
* Touchup
* add some fields and functions for windows like options
add test cases for windows options and refactor for additional string functions
* try to fix code coverage to 100% again. add some additional documentation and a few additional test cases to verify documentation
* remove some extra brackets
* add Tests and ability to handle program file inclusion in the single string.
add the ability to deal with a single string in the parse command and handle quoted string appropriately
* Add extra test cases for full coverage, clear up escape quote sequencing and handling of extra spaces
* add ignore_underscore test cases and options to app
* add ignore_underscore for add_sets and some more tests for the sets and subcommands
* add some documentation lines and some failing tests
* update readme with ignore_underscore option
* remove failing tests from known issue
* remove empty line for code coverage
* Adding new parse layout
* Dropping shortcurcuit from help, since it has special override
* Refactor help call
* Dropping shortcurcuit since it is not needed now that help has custom behavoir
* Dropping MaxSubcommand error (cannot occur)
Clang++/LLVM 6.0 complains about this from warning
-Wdelete-non-virtual-dtor which is included when using -Wall.
Both App and FormatterBase already have virtual destructors, so this
was probably just accidentally left out.
This is also a C++ best practice; I have drawn some guidelines from
here: http://www.gotw.ca/publications/mill18.htm
