mrgsolve 0.7.3

• Addressed an issue where model compilation on Windows systems failed when certain symbol names were used in the model (#97). In this release, a dllname-win.def file is created in soloc to export only the functions that mrgsolve needs to use.
• Added a check on the project argument to mread: if newline(s) are found, an error is generated and the user is prompted to use mcode instead.
• Several changes under the hood (#99)

The source package (built) is attached as mrgsolve_0.7.3.tar.gz. But the recommended installation method is with devtools::install_github("metrumresearchgroup/[email protected]", subdir="rdev")