calling same text again and again gives random language

[Milan Patel]

I passes same text several times to detect api and it gives me en and sv randomly.

detect('jason and his dad get new parts for jasons bike')
'en'
detect('jason and his dad get new parts for jasons bike')
'en'
detect('jason and his dad get new parts for jasons bike')
'sv'

[Michal Danilák]

See #13