Add CMake, reformat README.md, rename examples and remove relative include paths

[jopadan]

No description provided.

[dotted]

Wasn't able to build.

Running cmake . && cmake --build . in the root directory I get:

[ 63%] Linking C executable puttrain
/usr/bin/ld: libadikted/libadikted.so: undefined reference to `ceil'
/usr/bin/ld: libadikted/libadikted.so: undefined reference to `acos'
/usr/bin/ld: libadikted/libadikted.so: undefined reference to `sin'
/usr/bin/ld: libadikted/libadikted.so: undefined reference to `sqrt'
collect2: error: ld returned 1 exit status
make[2]: *** [CMakeFiles/puttrain.dir/build.make:87: puttrain] Error 1
make[1]: *** [CMakeFiles/Makefile2:177: CMakeFiles/puttrain.dir/all] Error 2
make: *** [Makefile:130: all] Error 2

When I run it in the libadikted folder it builds and links just fine.

Trying to tun the command from the mapslang folder gives me:

-- The C compiler identification is GNU 9.4.0
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Found PkgConfig: /usr/bin/pkg-config (found version "0.29.1")
-- Checking for one of the modules 'slang'
-- Checking for one of the modules 'libadikted'
CMake Error at /usr/share/cmake-3.16/Modules/FindPkgConfig.cmake:707 (message):
  None of the required 'libadikted' found
Call Stack (most recent call first):
  CMakeLists.txt:27 (pkg_search_module)


-- Configuring incomplete, errors occurred!
See also "/home/dotted/ADiKtEd/mapslang/CMakeFiles/CMakeOutput.log".

[jopadan]

I've added extra standard C libs to the root directory now.
Running cmake . && make install seems to work but I don't have the BuildTools cmake --build . available.
You need a compiled/installed libadikted for mapslang.

[dotted]

Continued in #48