* Added option to build Verse server with Mongo C Driver

- Official Mongo C Driver is used: https://github.com/mongodb/mongo-c-driver
- Added simple CMake find module
* Verse server is able to connect to MongoDB server.

Verse server connects to MongoDB server at startup and disconnect
at the end of run.
Better debug printing, loading of mongodb hostname and port from config file

 - Added better debug print, when config file is load
 - MongoDB hostname and port are read from ini file
 - Better including mongo.h file
 - Small refactoring
WIP: saving and loading verse node to/from database
Load mongo namespace from config file
Fix typo and small chnages to get rid of warnings.
Merge branch 'master' into mongodb
FFixed compile warning.

Signed-off-by: Jiri Hnidek <jiri.hnidek@tul.cz>
* Refactoring of code and added more blind functions.

Signed-off-by: Jiri Hnidek <jiri.hnidek@tul.cz>
WIP: saving context to database.

Signed-off-by: Jiri Hnidek <jiri.hnidek@tul.cz>
Merge branch 'mongodb' of github.com:verse/verse into mongodb
Small refactoring
Merge branch 'master' into mongodb

Solved conflicts:
	src/server/vs_main.c
Merge branch 'master' into mongodb
Refactoring of code.
WIP: storing nodes to mongodb.
WIP: try to use mongodb.
Bug fix: wrong allocation and free of memory.
Proper saving data to MongoDB.
WIP: support for node versions.