Add a let() expression
Add list-comprehensions
Merge branch 'let-expression' of git://github.com/OskarLinde/openscad into OskarLinde-let-expression
Merge branch 'list-comprehensions' of git://github.com/OskarLinde/openscad into OskarLinde-list-comprehensions
Add script to test rendering of exported CSG files.
Fix CSG output of offset().
Disable inf/nan cases for *.csg import tests.

The inf/nan tests fail when exporting CSG and rendering that output again
as currently inf/nan is written directly to the CSG file (e.g. r = inf)
which is not valid or even misleading in case a variable inf exists.
Merge branch 'master' into csg-import-tests
Put tests in correct test config
Merge remote-tracking branch 'origin/list-comprehensions' into list-comprehensions-and-let
Refactor let and list comprehension expressions a little
to be more in line with the other expression evaluation refactoring to minimize stack space
let()-expression: disable reassignments
Added testcases for let and list-comprehensions
Change order of dependency builds to avoid picking up the wrong dependency
Updated include guards to #pragma once
Merge branch 'master' into csg-import-tests
Merge pull request #806 from OskarLinde/list-comprehensions-and-let

List comprehensions and let update
bugfix: FindGLIB2 didn't clean up properly. added new pkg-config utility functions which can be reused
Merge branch 'master' into csg-import-tests
Merge pull request #797 from openscad/csg-import-tests

Csg import tests