Moved non-variable constants into class constants
Travis CI fixes
Updated MATH_BIGINTEGER_MODE_* constants and test case references
Fixed unit tests
Missed one constant in unit tests
Typo
Typo
Initial rebase
Changed internal parameters to statics
Removed MATH_BIGINTEGER_ prefix from constants since we are preparing for namespaces
Merge branch 'BigIntegerConstantsFix' of github.com:cnelissen/phpseclib into BigIntegerConstantsFix