New update functions for avl trees.
New write_top plugin
Added a version number in the output files
fixed a bug with empty chunks at flush time
updated/fixed the flush callback
New TopPs helpers for jsonrpc. This is only the beginning.
jsonrpc_cb_topps_get_top implemented
Do not store duplicate topps notifications
Added authentication
Flush when no topps file found
Flush priority when hostname was specified
Fixed 2 bugs in configure.in
Reshaped the algo for finding top-ps files
Merge branch 'plugin-write_top/5.2.0' into release/5.2.0
Merge branch 'plugin-jsonrpc/5.2.0' into release/5.2.0
Fixed a bug when pid/gid is null
Merge branch 'plugin-top/5.2.0' into release/5.2.0
New release 20130301