Merge pull request #23 from draganglumac/master

New man pages
Merge pull request #24 from draganglumac/master

Fixed a bug in jnx_list when deleting a node, fixed a bug in jnxbtree te...
Merge pull request #25 from draganglumac/master

Now the list of btree keys is in ascending order after the call to jnx_B...
Merged upstream changes.