Release 1.7.0

Issue tracker for 1.7.0

- [x] Too many HTTP requests - slowing sites #25 
- [x] Invalid Argument for Foreach #24 
- [x] Decompression error #14 
- [x] Call to undefined function wp_create_nonce #13 
- [x] Activated but doesn't appear in WordPress #26 
- [x] Fix transient names
- [x] Update Envato icon