addr: made DnetAddr structure on top of array not slice to allow it to be part of the map key. Added DnetRawID type.
route: added route tablereading classes and methods
stat: added initial global statistics implentation
Style cleanups (ifdef, extern, static, include and so on)
stat: read and parse statistics from elliptics nodes, return VFS and percentage per backend
Merge branch 'v2.26' of https://github.com/bioothod/elliptics-go into bioothod-v2.26

Conflicts:
	elliptics/ctogo.go
Merge branch 'bioothod-v2.26' into 2.26