fixed wrong varname in switch case
added test for some GMP functions to run on HHVM
bad function calls to is_prime function
placed the ecc-lib in a namespace and update all the code acordingly
using gmp_init before passing a string to gmp_strval when a base is set as 2nd param to avoid bugs in HHVM
set the ECCLib as a dependancy and install it with composer instead of including the files.
changed the SECcurve class methods to camelCase (since eccphp tests don't pass without that change
SECcurve was removed from phpecc and SECGcurve is now there in it's place
using official phpecc lib again since it has been updated.\nand added phpunit and phpcs as requirements
Merge pull request #20 from blocktrail/hhvm

changes/fixes to be compatible with HHVM