X3: Constrain `operator>`

It might be instantiated for user types inherited from classes in x3 namespace.

X3: Constrain `operator>`

It might be instantiated for user types inherited from classes in x3 namespace.

X3: Constrain `operator>`

It might be instantiated for user types inherited from classes in x3 namespace.

X3: Constrain `operator>`

It might be instantiated for user types inherited from classes in x3 namespace.

Merge pull request #767 from Lastique/feature/fix_missing_includes

Fix missing includes in `match_manip.hpp`

Merge pull request #767 from Lastique/feature/fix_missing_includes

Fix missing includes in `match_manip.hpp`

V2.Tests: Revise poorly named tests

Looking by the commit history they should not have been using classic iterators

V2.Tests: Revise poorly named tests

Looking by the commit history they should not have been using classic iterators

Merge pull request #745 from 3dyd/update-unicode-tables

Update Unicode tables

Merge pull request #745 from 3dyd/update-unicode-tables

Update Unicode tables