Gwenhywfar

More work on msgio module.

configure: Added check for header "sys/select.h".

msgio: Started working on a module for message exchange.

- abstracted from code in another project where it is used to read messages
from an UART bus and IPC clients using a single thread only
- added message code to be used for IPC via sockets

Detect and report certificate signature failures

TODO: Some ideas for threaded GUI.

tm2: Added type fields "pack" and "structAccess".

- "pack": Allows for using #pragma pack.
- structAccess: Allow to set placement of struct definition
(until now always private, but sometimes it is usefull to put the definition
in the public header file).

tm2: Fixed description for char_array.

Only copy if source is not NULL.

Some ideas for typemaker3.

Port deprecated QFlags constructor

When consumers want to build without deprecated Qt public API using for
example `-DQT_DISABLE_DEPRECATED_BEFORE=0x50f02` as a compile
definition, this line breaks the build. Adding this is currently in the
works for KMyMoney....

plugin: Fixed a typo, fixed memory leaks, increased verbosity.

plugin: Re-use existing code.

Incremented version.

Needed to check for latest features in plugin module (version >5.10.1.0).

plugin: Combine plugin descriptions from disk and added plugins.

Gwenhywfar is able to load plugins. However, this can be restricted when
building gwen in a fully static environment which don't allow for dynamic
loading of plugins.

In such a case plugin providers can add just create a plugin and add it to...

plugindescr: More cleanup of _readPluginDescriptionFromFile().

Cleanup plugin stuff (needs SO_VERSION/AGE++!).

- added GWEN_Plugin_GetPluginDescription()
- added GWEN_Plugin_SetPluginDescription()
- moved forward declarations to c-file, make private functions static
- removed unnecessary header includes
- split GWEN_PluginManager_LoadPlugin() into smaller functions...

APIs: support MSVC

directory_p.h: remove Unix-specific header

xmlcmd_lxml.c: use GWEN_Text_strndup

gwbuild: Improved help string.

gwbuild: Improved output of executed commands. Removed unneeded code.

gwbuild: Use new redirection code of GWEN_Process module.

This finally creates consistent output for gwbuild. Previously we didn't
redirect output of the created compile/link/typemaker2 processes so they
wrote to the console whenever they felt like it, sometimes scrambling the...

GWEN_PROCESS: Fixed creation of redirection files. Changed order.

Need to change working dir after creating the redirection files, otherwise
relative paths don't work.

GWEN_Process: Started adding redirection to/from files (for now POSIX only).

gwbuild: Reverse order when adding files to buildctx.

Upon GWB_BuildCtx_AddFile() the added file is assigned an id, to make that
available to the build cmd we should add it to the buildctx first.

gwbuild: Fixed a bug (don't replace NULL folder with "./").