make [declare -lib] handle absolute paths (and namespace-prefixed paths) consistent with object boxes

This will allow legacy externals like iemmatrix and zexy to properly load
aliases the first time when the user instantiates an object with
[namespace_prefix/alias_name]

This becomes relevant when there are kludge classes that essentially just
"#include" the original C file of a class and add an alias_setup function
which just calls the original setup routine. (For example, see iemmatrix.)
However, such an approach still calls class_new with the original class name.
Thus "namespace_prefix/classname" gets added to the pd_objectcreator
methodspace, but "namespace_prefix/alias_name"-- which is what we want--
does not. This results in a series of 1000 recursive calls into
pd_objectmaker's new_anything method. (I.e., sys_load_lib finds the
"namespace_prefix/classname" is already loaded, new_anything_sends a
typedmess to pd_objectmaker's new_anything method, which calls
sys_load_lib, etc.)

To prevent this, we just make sure to add "namespace_prefix/alias" by
adding the relevant lines to class_addcreator. This should really be
happening anyway-- since internal classes don't have a class_loadsym
they aren't affected, and externals with aliases won't work with
namespace prefix without this.

Backport rev. 5a58ca2b by msp from vanilla: patch 1990599 - allow recursive calls of new_anything().

These bugs were discovered via static code-analysis
https://scan.coverity.com/projects/pure-data-pure-data
(The CID numbers are the "Coverity IDs" used to identify the various bugs)

- Don't free binbuf within glist_readfrombinbuf (CID:74871)
- it must be deleted by the caller
- Initialize sockaddr_in (CID:74861,74862,74863,74866)
- Initialize indelay/outdelay (CID:74864,74865)
- Initialize device-arrays (CID:74853,74854,74855,74856)
- Closing unneeded sockets (CID:74827)
- Initialize sockaddr_in (CID:74860}
- Close file-descriptor if the soundfile is unparsable (CID:74822,74823)
- Close file-handle in cleanup (CID:74816)
- Call va_end() when handling variadic args (CID:74872)
- Added missing break (CID:74800)
- Prevent NULL-dereferences (CID:74792,74793)
- Size checks when copying into string buffers (CID:74844,74845,74846,74847,74849)
- Freeing no-more used storage (CID:74832)
- Fixed code block (CID:74806)
- Initialize sockaddr_in (CID:74860)
- Initialize array-values to 0 (CID:74867)
- Free allocated memory (CID:74813,74830)
- Removed allocation of unused memory
- Use pd_free() to free templates (CID:74814)
- template_free() does not free the entire structure (it misses the pd_new() part)
- initialize variable (CID:77865)
- Prevent NULL-pointer dererencing (CID:77864)
- Free heap-allocate binbuf after use (CID:74833)

*added ability to do shift+home and shift+end to select text inside objects
*fixed manual resizing of subpatches which did not work in the current implementation.

*ported fixes for crasher when sending a "dsp" message to tilde objects.  Backported from Pd Vanilla commits [8019b5] and [5769c5]

fixed regression from IOhannes' proposed fix (see e7acc479 commit) that affects propagation of scalar pointers through the trigger object. Use scalar-help.pd to test.

implemented improvement for empty lists as suggested by IOhannes http://lists.puredata.info/pipermail/pd-list/2013-02/101518.html