Fix #32 - The config option will be ignored.

[shoo]

If config is specified, use that configuration.
If no config is specified and the project has a configuration named "gendoc", then use the "gendoc" configuration.
Otherwise, it will use the default configuration.

[codecov]

Codecov Report

Merging #33 (6196249) into master (3288e97) will increase coverage by 0.83%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #33      +/-   ##
==========================================
+ Coverage   87.96%   88.79%   +0.83%     
==========================================
  Files           8        8              
  Lines        1113     1133      +20     
==========================================
+ Hits          979     1006      +27     
+ Misses        134      127       -7     

Impacted Files	Coverage Δ
source/gendoc/config.d	73.27% <100.00%> (+2.48%)	⬆️
source/gendoc/misc.d	100.00% <0.00%> (+0.61%)	⬆️
source/gendoc/modmgr.d	97.20% <0.00%> (+2.40%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3288e97...6196249. Read the comment docs.