environ: explicitely specify copy/move stuff
arguments: explicitely specify copy/move stuff

Tweak constructor.
process: delete non-standard copy constructor
pam: delete non-standard copy constructor
options: explicitely specify copy/move stuff

Add insert function.
container: add insert and erase functions

Add is_vector type trait.
environ: replace set functions with template
container: don't return iterator

Use push_back for vectors.
environ: use insert instead of operator[]
environ: rename set/reset to insert/erase

For consistency.
arguments: use insert functions from container
x11::server: environ::set was renamed to environ::insert
xml: use insert/erase from container
slap: use insert/erase from container
pam: rename set/reset to insert/erase

For consistency.
options: use insert/erase from container

Remove emplace function.
address: add value function
hei: rename types.h into hei_type.h
utility: add noexcept
tern: sprinkle constexpr and noexcept