[build] Run spellchecker on INSTALL and README
[build] Fix cuba installation instructions
[cuba] Support 3.3 and 4.0. Drop 3.2 support.
[configure] Infer cuba directory from partview
[configure] don't assume cuba's partview exists
[build] Removed rootmap files (now generated during build) from dist
[build] Fixed ROOT dictionary creation for models/base

* BATCalculator contains a ClassDef, so needs a "+" in the LinkDef
  pragma.

* BATCalculatorLinkDef.h is obsolete and was replaced by
  LDef_roostats.h.

* Fixed header guards in LinkDef files in models/base.
[doc] Replace eps bat icon with pdf to fix `make dist` with older pdflatex versions