Strict eval variable declarations are lexically scoped, assign expected result value to a previously declared global (issue #35)

Add missing variable declarations (issue #35)

Split S12.6.3_A10 and S12.6.3_A10.1 because both files seem to test implicit global variables (issue #35)

Changes (issue #35)

- Add missing noStrict flags.
- Change 13.2-15-1 and 13.2-18-1 to use assert.js and propertyHelper.js (simplifies writable and configurable checks while in strict mode).
- Add variable declarations for globals.
- Create copies of S13.2.1_A6_T1 and S13.2.1_A6_T2 instead of adding variable declarations, because both files seem to test implicit global variables.
- Split S13_A14 and S13_A16 to work in strict mode.
- Remove assignment to .name property.

Add missing noStrict flags (issue #35)

Add missing noStrict flags and variable declarations (issue #35)

Add missing noStrict flags (issue #35)