PR for v0.5 Release

[jeevatkm]

• Log level exposed Expose log level for default logger and provide helper methods aah#61
• Added logger hooks capability Add logger hook support aah#66
• Use ess as log pattern/flag parser
• setwriter method added and cleanup
• Fix fatalln method

[codecov]

Codecov Report

Merging #8 into master will increase coverage by 4.86%.
The diff coverage is 98.03%.

@@            Coverage Diff             @@
##           master       #8      +/-   ##
==========================================
+ Coverage   92.51%   97.38%   +4.86%     
==========================================
  Files           9        9              
  Lines         401      420      +19     
==========================================
+ Hits          371      409      +38     
+ Misses         25        7      -18     
+ Partials        5        4       -1

Impacted Files	Coverage Δ
console_receiver.go	100% <100%> (ø)	⬆️
entry.go	100% <100%> (ø)	⬆️
log.go	100% <100%> (+9.47%)	⬆️
default.go	100% <100%> (+15.78%)	⬆️
hook.go	100% <100%> (ø)
formatter.go	100% <100%> (ø)	⬆️
util.go	90.32% <100%> (-0.59%)	⬇️
file_receiver.go	92% <90%> (+1.78%)	⬆️

---

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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[codecov]

Codecov Report

Merging #8 into master will increase coverage by 4.86%.
The diff coverage is 98.03%.

@@            Coverage Diff             @@
##           master       #8      +/-   ##
==========================================
+ Coverage   92.51%   97.38%   +4.86%     
==========================================
  Files           9        9              
  Lines         401      420      +19     
==========================================
+ Hits          371      409      +38     
+ Misses         25        7      -18     
+ Partials        5        4       -1

Impacted Files	Coverage Δ
log.go	100% <100%> (+9.47%)	⬆️
hook.go	100% <100%> (ø)
default.go	100% <100%> (+15.78%)	⬆️
entry.go	100% <100%> (ø)	⬆️
console_receiver.go	100% <100%> (ø)	⬆️
formatter.go	100% <100%> (ø)	⬆️
util.go	90.32% <100%> (-0.59%)	⬇️
file_receiver.go	92% <90%> (+1.78%)	⬆️

---

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 336897b...cf63b41. Read the comment docs.