add gender parameter to Person firstname and name  methods

add FirstNameMale and FirstNameFemale method to all Person classes

add gender parameter to some localized lastname and prefix method

update README

add missing prefix method for bg_BG Person provider

set male and female firstnames for netherland locales

refactore is_IS firstname providers

add more values for gender parameter

rename person prefix methods to title and refactore them

separate male and female en_US firstname

update all Person Providers

add some unit tests for man, woman firstname and title

replace male and female title by academic degrees only for pl_PL

add polish names source comment

update male and female firstname for fr_FR, fr_CA and fr_BE

update male and female firstnames for es_AR, es_ES and es_PE

update male and female firstnames for pt_BR

update male and female firstnames and titles for it_IT

change title behavior for cs_CZ

update male and female firstnames for da_DK

change title behavior for nl_NL

update male and female firstnames for hu_HU

fix PSR2 coding style

fix PSR2 coding style

update male and female bengali titles

fix firstnames unit tests for me_ME

update male and female firstnames and titles for en_ZA and fi_FI (some names stay with gender unkown)

update male and female firstnames for lv_LV

update male and female firstnames for tr_TR

update male and female firstnames for zh_CN

update male and female firstnames for ja_JP

update male and female firstnames for fi_FI

update male and female firstnames for bn_BD

update male and female firstnames for ru_RU

fix title method for sk_SK

update partially male and female firstnames for sr_*

update README

remove deprecated comments

update male and female firstnames and title for hy_AM

update male and female firstnames for uk_UA

add gender option to name formatter

fix PSR2 coding style

make gender option more simple and improve implementation

restore unknown gender firstnames into male and female firstnames list

update es_ES firstnames list

restore source link for sr_RS Person firstname provider

simplify Person name unit test
Merge pull request #114 from csanquer/feature_firstname_gender

Add firstname gender method to all Person provider