Make the server http compliant

[sansyrox]

Fixes #31

This PR will fix (#31)

[sansyrox]

The dropping of request was due to poor error handling.

It can now process 100,000 reqeuests without dropping.

➜  ~ oha -n 100000 http://localhost:5000
Summary:
  Success rate:	1.0000
  Total:	35.7292 secs
  Slowest:	0.0700 secs
  Fastest:	0.0010 secs
  Average:	0.0179 secs
  Requests/sec:	2798.8274

  Total data:	1.72 MiB
  Size/request:	18 B
  Size/sec:	49.20 KiB

Response time histogram:
  0.005 [7091]  |■■■■■■■
  0.010 [29564] |■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■■
  0.014 [9949]  |■■■■■■■■■■
  0.019 [4959]  |■■■■■
  0.024 [18979] |■■■■■■■■■■■■■■■■■■■■
  0.029 [19959] |■■■■■■■■■■■■■■■■■■■■■
  0.033 [6878]  |■■■■■■■
  0.038 [945]   |■
  0.043 [840]   |
  0.048 [638]   |
  0.053 [198]   |

Latency distribution:
  10% in 0.0064 secs
  25% in 0.0087 secs
  50% in 0.0194 secs
  75% in 0.0258 secs
  90% in 0.0295 secs
  95% in 0.0318 secs
  99% in 0.0433 secs

Details (average, fastest, slowest):
  DNS+dialup:	0.0026 secs, 0.0016 secs, 0.0030 secs
  DNS-lookup:	0.0000 secs, 0.0000 secs, 0.0001 secs

Status code distribution:
  [200] 100000 responses