Moved the `.targets` file and build tools from the directory `bin` to `build` in the package so that the targets are imported automatically into a project importing the package.
Moved the `.targets` file and build tools from the directory `bin` to `build` in the package so that the targets are imported automatically into a project importing the package.

closed: #26.

fsprojects/FsLexYacc,mrgleba/FsLexYacc