Added method to recurse through parent directories and find the first workspace.
Added dir kwarg to search.
Search returns workspace object.
Added bundler.
Converted tests to RSpec.

--HG--
rename : test/unit/compile/extension/apw_test.rb => spec/compile/extension/apw_spec.rb
rename : test/unit/project_test.rb => spec/project_spec.rb
rename : test/unit/system_file_test.rb => spec/system_file_spec.rb
rename : test/unit/system_test.rb => spec/system_spec.rb
rename : test/unit/workspace/extension/apw/apw-test.apw => spec/workspace/extension/apw/apw-test.apw
rename : test/unit/workspace/extension/apw/apw-test.axs => spec/workspace/extension/apw/apw-test.axs
rename : test/unit/workspace/import-test/duet-module/duet-lib-pjlink_dr0_1_1.jar => spec/workspace/import-test/duet-module/duet-lib-pjlink_dr0_1_1.jar
rename : test/unit/workspace/import-test/import-test.apw => spec/workspace/import-test/import-test.apw
rename : test/unit/workspace/import-test/import-test.axs => spec/workspace/import-test/import-test.axs
rename : test/unit/workspace/import-test/include/import-include.axi => spec/workspace/import-test/include/import-include.axi
rename : test/unit/workspace/import-test/module-compiled/test-module-compiled.axs => spec/workspace/import-test/module-compiled/test-module-compiled.axs
rename : test/unit/workspace/import-test/module-compiled/test-module-compiled.tko => spec/workspace/import-test/module-compiled/test-module-compiled.tko
rename : test/unit/workspace/import-test/module-source/test-module-source.axs => spec/workspace/import-test/module-source/test-module-source.axs
rename : test/unit/workspace_test.rb => spec/workspace_spec.rb
Converted apw_spec to RSpec.
Updated dependencies.
apw_spec passes.
Updated system spec workspace path.
Added travis config.