Adding metadata interface

This patch:
1) Adds the definition of the metadata interface
to the header file. The functions that were exposed
for no good reason are now hidden.
2) Previously exposed functions and their descriptions
are removed from the public header and placed into
the source code for now.
3) The function that reads the config file no longer
tries to close file in case of error.
4) Lines collection is still passed in into the reading
function but as a collection itself not as a pointer
to it.
5) All the parts related to processing lines are currently
ifdefed using HAVE_VALIDATION that is currently is not defined.
This is done to disable creation of the lines collection
utill it is actually needed. I did not want to blindly remove
it though and loose already done work that will be useful
in future.
6) Version of the library and interface is updated
7) New header and source modules are introduced to hold functions
related to the meta data. They are mostly stubbed out.

This is incomplete patch. It builds and make check runs.
It is created just to simplify the review a bit.

1 files changed, 5 insertions, 2 deletions

diff --git a/common/ini/Makefile.am b/common/ini/Makefile.am
index af81a9f89..76205262d 100644
--- a/common/ini/Makefile.am
+++ b/common/ini/Makefile.am
@@ -33,12 +33,15 @@ dist_include_HEADERS = \
 # Build library
 lib_LTLIBRARIES = libini_config.la
 libini_config_la_SOURCES = \
-    ini_config.c
+    ini_config.c \
+    ini_metadata.c \
+    ini_metadata.h
+
 libini_config_la_LIBADD = \
     -L$(topbuilddir)/collection \
     -lcollection
 libini_config_la_LDFLAGS = \
-    -version-info 1:0:0
+    -version-info 2:0:0
 
 # Build unit test
 check_PROGRAMS = ini_config_ut