Change default date format for Finnish

Fix zh_* locale parsing

By properly searching for the first undescore

Fix return of wrong pattern piece

The getPatternIncluding method would return quoted pieces if
the check contents of the quoted part included the format letter.

For instance for Danish (da_DK), the pattern is "EEE 'den' d. MMM"
If we are calling `getPatternIncluding("d", "da_DK")`, the method
would return `"den'"´, but we would like to return `"d."`.

This commit ignores pieces with apostrophe ("'") in them.

add zh_CN locale

Bugfix: Wrong display texts in date mode for some locales (Chinese, Japanese, etc)

Export DatePickerProps

Fixing different language related crashes

pickerview android display text size changed from sp to dp.

Bugfix: Too many words in day label for some locales

Affecting portugese, spanish, russian etc
Fixes #164

Cleanup

Improved architecture

Separating concerns
Remove duplicated code

Re-add tests for Android