Add two tests showing problems with scalar delays (currently failing).
Make the C++ SpikeQueue correctly work with scalar delays
Use the source clock, not the synapses clock, when converting delays to integers
Raise a warning when using different dts for source, target, synapes. This can lead to unexpected results since a pre(post) pathway is always run on the source(target) clock. In particular, delays are rounded to the pathway's clock.
Merge pull request #352 from brian-team/synapse_delay_fixes

Synapse delay fixes
Also test OpenMP with 3 and 4 threads (currently failing)
For now, evaluate the threshold and SpikeGeneratorGroup in a single thread. The previous solution assumed knowledge about the static scheduling that I don't think we have. Fixes #358
Merge pull request #359 from brian-team/fix_358

Fix issuse #358
Refer to Brian2 as Beta, not as Alpha
Add release notes for Brian 2.0beta
[ci skip]
Add "Problems with numerical integration" to the known issues
[ci skip]
Document linked variable mechanism
[ci skip]
Added warnings about potential problems with OpenMP code
Small doc fixes
[ci skip]
Final update of the number of bugs in the release notes
[ci skip]
Merge pull request #360 from brian-team/preparations_2.0beta

Preparations for 2.0beta
Rename `brian_prefs` to `prefs` in the release scripts.
[ci skip]
***** Release Brian2 2.0beta *****
Fix (and test) the sympy rendering of small values. Fixes #361
Add an empty category for `codegen.runtime`

Before, using attribute-based (and not dictionary-based) access failed for preferences such as `codegen.runtime.weave.extra_compile_args`.