Fix missing 'buildtool_depend' in metapackage xml.

Fix #2.

Also fixed incorrect 'website' url (pointed to wiki page for industrial_core package).
Added temp files to ignore list
Added explicit library linking (by name) to make file
Merge pull request #6 from ros-industrial/ind_core_issue10_library_gen

Pull request a result of fix for industrial_core issue #10
Merge pull request #3 from gavanderhoorn/issue2_metapackage_buildtooldepend

Fix issue #2: missing buildtool_depend
Added explicit library linking to unit test
Merge pull request #7 from ros-industrial/ind_core_issue10_library_gen

Added explicit library linking to unit test
fix merge conflicts