Make package Julia v0.7 and v1.0 compatible

Small fixes to 0.2.0 version

* Fix one deprecated syntax `info`
* Do not allow to fail on Julia v1.0.0

v0.1.0

Fix deprecations (#5)

v0.0.2: Do not export all functions (#1)

Four functions (`add_master_elements!`, `add_slave_elements!`, `get_master_elements`, `get_slave_elements`) are dispatched from `FEMBase.jl` to avoid name conflicts. Also fix license header for one file.

Initial release

Initial commit

Set up package structure and add initial code from JuliaFEM.jl. Needs
refactoring + testing.