Change "netdata" to "Netdata" in all docs (#6621)

* First pass of changing netdata to Netdata

* Second pass of netdata -> Netdata

* Starting work on netdata with no whitespace after

* Pass for netdata with no whitespace at the end

* Pass for netdata with no whitespace at the front

libnetdata/storage_number/README.md

@@ -1,4 +1,4 @@
-# netdata storage number
+# Netdata storage number
 
 Although `netdata` does all its calculations using `long double`, it stores all values using
 a **custom-made 32-bit number**.