Romanian translation.

Here is a Romanian translation.
Notes (for values/strings.xml):
* In the 'shutter_speeds' and 'nd_values' arrays were marked translatable="false"
Not true, the decimal separator is localizable (in fact, you would need to use a number formatter)
The "ND" in 'nd_values' is localizable. The / and " might also be localized in some languages.
So, took it out.
* The English for hours/minutes/seconds seem inconsistent (length). If I see "min", I also expect "sec"
I did keep it that (inconsistent) way in Romanian. If you decide to go with min/sec, then the Romanian would also be min/sec. If you go with m/s in English, then m/s would be also fine for Romanian
* For the title (nd_value_text) I have provided 2 translations. The un-commented one is better, but if you have space constraints and it does not fit, then use the commented one.