* Adding first draft of Sets
Use IsMember now
Using IsMember as backend for Set
Non-const validator backend
Move set tests to set
Clearer inits
* Drop shortcut
Tighten up classes a bit for MSVC
Check with GCC 4.8 too
* Simpler templates, but more of them
Dropping more type safety for older compilers
Shortcut string set
* Adding shortcut init
Making g++ 4.7 docker image happy
Fix Clang tidy issue with last commit
Adding one more shortcut, adding a couple of tests
* Dropping dual pointer versions of code
* Smarter shortcut syntax
* Adding slighly faster choices
* Cleanup to make InMember simpler
* Drop choices for now, adding some tests
* ValidationError is now always the error from a validator
* Support for other types of initializer lists, including enums
* Factor out type utilities, single version of IsMember code
* Adding a few tests for #224
* Minor cleanup for Validation Error
* Adding tests, moved deprecated tests
* Docs updates
Add a flag that specifies that positional options can only occur as the last arguments of a command line. Will generate an ExtrasError if all positional arguments are not captured, regardless of the state of allow_extras.
* 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
This mostly is cleanup, with fewer alternative methods and more standard syntax, avoiding the use of the namespace all the time. Validators are simpler and are added through `->check()`.
Defaults are automatic, and can be specified with a final arg to the options.
Expected arguments and required arguments are now accessed through a pointer to option.
Option now can be checked as a bool to see if the argument was passed.
Errors have better organisation.
