CUDA Support for agents

[hades-rp2010]

Wrt #162

• On Policy agents
• Off policy agents

[codecov]

Codecov Report

Merging #388 (b2f71a6) into master (25eb018) will increase coverage by 0.02%.
The diff coverage is 95.65%.

@@            Coverage Diff             @@
##           master     #388      +/-   ##
==========================================
+ Coverage   91.28%   91.30%   +0.02%     
==========================================
  Files          90       90              
  Lines        3809     3818       +9     
==========================================
+ Hits         3477     3486       +9     
  Misses        332      332              

Impacted Files	Coverage Δ
genrl/agents/deep/td3/td3.py	93.10% <0.00%> (ø)
genrl/trainers/offpolicy.py	92.42% <ø> (ø)
genrl/core/rollout_storage.py	89.62% <92.85%> (ø)
genrl/agents/deep/a2c/a2c.py	93.58% <100.00%> (ø)
genrl/agents/deep/base/offpolicy.py	97.53% <100.00%> (+0.12%)	⬆️
genrl/agents/deep/base/onpolicy.py	96.15% <100.00%> (ø)
genrl/agents/deep/ppo1/ppo1.py	100.00% <100.00%> (ø)
genrl/agents/deep/sac/sac.py	93.54% <100.00%> (+0.21%)	⬆️
genrl/agents/deep/vpg/vpg.py	94.33% <100.00%> (ø)
genrl/core/buffers.py	95.31% <100.00%> (+0.07%)	⬆️
... and 1 more