Japanese and Finnish locales and proguard

[Rexee]

These 2 locales "org.ocpsoft.prettytime.i18n.Resources_fi" and "org.ocpsoft.prettytime.i18n.Resources_ja" use reflection to get unit names:

 private String getUnitName(TimeUnit unit)
      {
         return unit.getClass().getSimpleName();
      }

As result, if we use Proguard, then there will be crashes because Proguard will obfuscate names of these classes. There is 2 possible solutions:

• Solution 1: rewrite these 2 locales to works like other locales
• Solution 2: add in proguard rules following line: -keep public class * implements org.ocpsoft.prettytime.TimeUnit

I think Solution 1 is more correct, but Solution 2 is more easy

[lincolnthree]

I agree. These should be re-written. Feel like sending a PR? Thanks for the issue and sorry for the delay!

[matteinn]

I confirm solution 2 works fine as a workaround

[lincolnthree]

Hey @matteinn Thanks for your solution! I will add this to the ProGuard file: https://github.com/ocpsoft/prettytime/blob/master/core/src/main/resources/META-INF/proguard/prettytime.pro