Prevent some errors;
Handled situation with multi-frame DOM environments;
Used strict mode;
Added defaultSelector;
x++ -> ++x;
Fixed bug in `join`;
Refactored `join` function;
Allow to use constructor without `new` keyword;
Removed first type check;
Added `toFunction` util function;
Fixed bug in `average` function;
Few changes;
Merge branch 'lambdas' into 1.1.0
Checked source object in a different way;
Removed `longCount` function;
tests: initial commit;
Added few more tests;
Merge branch 'tests' into 1.1.0
Optimized `average`;
Optimized `any`;