add function FormatAmountWithoutSymbol
check GetHomeFromSystem output string
GetNymName without default params

SWIG for Java generates for each default param two overloaded methods, one with and one without the param.
GetAcctName without default params

SWIG for Java generates for each default param two overloaded methods, one with and one without the param.
Merge pull request #481 from mhamrle/android_changes_part_1

Android changes part 1