move name resolution methods, externalize additional names, fix naming problem of the unresolved interface

remove import statement from generated code (this also implies Instant and Period must be qualified everywhere). some additional minor code quality improvements.

clean up eclipse project files and ignore them from now on

See merge request !12

Resolve "Qualified generic token types"

Closes #24

See merge request !11

Resolve "Create guides for contributing"

Closes #21

See merge request !8

Add a 3-Clause BSD License

See merge request !9

Resolve "Create script to include commit in version string"

Closes #20

See merge request !7

split backend into a file for each contained aspect

See merge request johannes.mey/relast!6

- expected error output does not have to be in actual order, and can contain empty lines and comments which both will be ignored