cmark/src/cmarkConfig.cmake.in, branch master

build: substitute the path into the generate files

2020-01-25T01:27:22+00:00

This resorts to the variable substitution to ensure the path embedded is
correct.  Without this, the path at the time of the configuration.  In
the case of the Swift project, this ended up searching in the *source*
directory rather than the *build* directory.  This will ensure that we
export the file to an absolute location and we use the same location in
the `cmarkConfig.cmake` file by means of CMake's `configure_file`
subsitution.

build: use absolute path for cmarkTargets.cmake

2020-01-23T16:32:43+00:00

Adjust the include of the CMake file to use a cmarkConfig.cmake relative
location which enables use without considerations for the path.

build: add exports targets for build tree usage

2020-01-03T05:58:05+00:00

This enables the use of the export targets from the build tree to allow
easy use of the CMark library in other projects.

Resolves: #307