Ability to check for inconsistent use of capitalization

[ajeanmahoney]

Just like #24, but the report captures inconsistent capitalization of terms within the text. For example:

6TiSCH-Aware (1)
6TiSCH-aware (17)
6top protocol (6)
6top Protocol (2)
Address Lookup (3)
address lookup (12)
Architecture (29)
architecture (22)
Backbone (4)
backbone (15)
backbone router (1)
Backbone router (2)
Backbone Router (27) 
ChannelOffset (1)
channelOffset (24)
Deterministic (3)
deterministic (12)
Distributed Routing (1) 
distributed routing (6)

Note that the RPC uses title case for section titles, so if a term is only capitalized in a heading, this would not be considered inconsistent and does not need to be highlighted.