Subcontext fixes and formatting
Moved is_parser trait to its own file
Fixed qi::alternative test code.
Made alterative_function functor const to match non-specialized version.
Removed some unnecessary namespacing aliasing in tests.
Merge pull request #12 from vtnerd/bugfix/qi_tests

Bugfix/qi tests
moved (variant)has_substitute and (variant)find_substitute into traits
Fix for case where a single-element sequence is not being moved into a variant that can accept it.
cleanup
added mising files
various sequence handling fixes
Added type-erased parser, tests and examples
Subcontext fixes and formatting
Added type-erased parser, tests and examples
Moved is_parser trait to its own file
Merge branch 'develop'

Conflicts:
	include/boost/spirit/home/x3/core/parser.hpp
Merge branch 'origin/x3-devel'
new facade-based API
Merge pull request #13 from jamboree/develop

x3 new facade-based API
Merge branch 'develop' into x3-devel