Full update of packaging and version to latest 1.5

The PR is a full update from my personal fork of the packaging and version of lcm to latest 1.5. Please note that for testing you also probably need the pristine-tar and upstream branches or use the fork directly https://salsa.debian.org/jrivero-guest/lcm/.

Sponsoring needed :)

Commits are self-explanatory of the changes, the whole list can be resumed as:

• New upstream version 1.5.0+repack
• Formatter changes
• Bump standards to 4.6.2
• Use default-jdk package for java support
• Bump version to 1.5.0+repack1
• Rediff patches:
• PATCH: use gnuinstalldirs in CMake
• PATCH: use gtest from system
• PATCH: use java system dependencies instead of embedded files
• PATCH: Encode utf8 characters to fix the java build
• PATCH: fix manpages name to make lintian happy
• Add CMake to d/control
• Use --no-parallel for testing
• Cleanup d/rules
• Update liblcm-doc.docs for new paths
• Generalize d/liblcm-dev.install
• Convert package to use pybuild. Change d/rules heavily.
• Update java dependencies in d/control
• Update d/copyright file
• Keep lcm-java.pc only in the java package
• Remove .doctrees from the -docs package
• Add bindnow to DEB_BUILD_MAINT_OPTIONS
• Replace embedded fonts and jquery with system dependencies
• Remove .gitignore from liblcm-doc installation
• Update existing patch for javadoc generation
• Update d/changelog
• Rework java patch to use offline generation
• Reorder java dependencies: in -bin and -java
• Adding Section: to packages
• Added autotest: install and build-cpp

TODO:

• Adapt patches to DEP-3 and submit them to upstream (when possible)
• Dig into the Lintian warning for the lcm.jar file. I was unable to know where it comes from