Icon-O-Matic: Generalize some classes

* Turns PathContainer, ShapeContainer, StyleContainer into Container.
* Makes Shape use Container for storing Tansformers instead of
reinventing the wheel yet again.
* Moves common logic from AddPathsCommand, AddStylesCommand,
AddShapesCommand, and AddTransformersCommand to AddCommand.
* Factors out common logic from two more commands similar to above.
This adds the MoveCommand and RemoveCommand classes.
* Cleans up some code style.

Change-Id: I59eca94a1c45eac608514f269f6e5f8628f93fab
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6640
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

* Merged weak-symbols branch.
* Fixed trivial merge conflict in src/system/libroot/posix/locale/nl_langinfo.cpp
* Fixed gcc 2 compilation of src/system/glue/init_term_dyn.c.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39571 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Put the remaining libicon.a classes into the BPrivate::Icon namespace.
* Minor cleanup (like removing the extra blank line between the copyright and the
header guard).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20507 a95241bf-73f2-0310-859d-f6bbb57e9c96

* (temporarily) added libexpat, built as static lib, removed all
clutter, straight from the sources of release 1.95.8, configured
to obtain expat_config.h, seems to work fine


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18552 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Transformable::Reset() + Invert() didn't notify
* Path and StyleContainer take an index in Add...()
* FlatIconImporter works when "appending" another icon


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18448 a95241bf-73f2-0310-859d-f6bbb57e9c96

* moved all the classes actually needed for reading a
vector icon to this place, #ifdef'd out all the editing
features (listening, referencing, converting to
PropertyObject... etc)
* TODO: put into BPrivate namespace...


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18396 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Merged weak-symbols branch.
* Fixed trivial merge conflict in src/system/libroot/posix/locale/nl_langinfo.cpp
* Fixed gcc 2 compilation of src/system/glue/init_term_dyn.c.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39571 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Put the remaining libicon.a classes into the BPrivate::Icon namespace.
* Minor cleanup (like removing the extra blank line between the copyright and the
header guard).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20507 a95241bf-73f2-0310-859d-f6bbb57e9c96

* (temporarily) added libexpat, built as static lib, removed all
clutter, straight from the sources of release 1.95.8, configured
to obtain expat_config.h, seems to work fine


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18552 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Transformable::Reset() + Invert() didn't notify
* Path and StyleContainer take an index in Add...()
* FlatIconImporter works when "appending" another icon


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18448 a95241bf-73f2-0310-859d-f6bbb57e9c96

* moved all the classes actually needed for reading a
vector icon to this place, #ifdef'd out all the editing
features (listening, referencing, converting to
PropertyObject... etc)
* TODO: put into BPrivate namespace...


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18396 a95241bf-73f2-0310-859d-f6bbb57e9c96