Test 125

Added a new test to help @jwillis with vectorization.

The old tests are now more thorough as well.

Implements #188 (closed).

Added 24 commits:

• 133171b2...62e0011a - 23 commits from branch master
• d3dd5d55 - Merge branch 'master' into test_125

Added 1 commit:

• 4855f1da - Formatting

Title changed from Test 125 to [WIP] Test 125

Reassigned to @matthieu

Title changed from [WIP] Test 125 to Test 125

Added 7 commits:

• 4855f1da...352f3185 - 5 commits from branch master
• bf45fac8 - Merge branch 'master' into test_125
• 60d097d2 - Make all tests work in MINIMAL_SPH, DEFAULT_SPH and GADGET2_SPH modes

Status changed to merged

mentioned in commit f7eab093