Attempt to fix map gc

Attempt to fix destructive iterators

Fix return dtor macro

Refactor of queue iterator

Fix many memory leaks

Minor refactor of vector clear and realloc

Fixed some memory leaks thanks to new memtest env

Add valgrind to travis config

Merge branch 'master' of github.com:php-ds/ds

Fix set by reference handler, attempt memtest

Fix json/spl dependencies

Fix json header include and specify dependencies to enforce module
loading order. Otherwise an in-tree build will fail.

Merge branch 'master' of github.com:php-ds/ds

Fix object release memory leaks #30

Update README.md

Update README.md

Update PECL badge

Update PECL package date

1.1.0

Merge branch 'master' of github.com:php-ds/ds

Add Pair::copy

Update README.md

Update CHANGELOG.md

Update changelog for 1.0.4

Update README.md

1.0.4