Allow v0.7 of Imagine Bundle

[trsteel88]

php-imagine/Imagine#547

Q	A
Branch?	1.0 and 2.0
Bug fix?	yes
New feature?	no
BC breaks?	yes
Deprecations?	no
Tests pass?	yes
License	MIT

[robfrawley]

None of the test runs on Travis actually pull and test v0.7; we need to ensure the newer version is actually tested before merging this.

https://travis-ci.org/liip/LiipImagineBundle/jobs/232226661#L232

[trsteel88]

@robfrawley I've updated the travis config to test against 0.6 and 0.7.

It looks like something has failed that isn't failed to the 0.7 change? Are you able to re-execute the tests on your end?

[trsteel88]

@robfrawley any idea why that 1 test is failing? That wouldn't be from this PR's changes.

https://travis-ci.org/liip/LiipImagineBundle/jobs/232720653

[robfrawley]

I'll take a closer look at this late tonight over the weekend.

[trsteel88]

Thank you.

[robfrawley]

@trsteel88 Are you aware of any changes to the grayscale handling with the new Imagine library version?

[trsteel88]

@robfrawley no I'm not. However, that failed test is on the older version anyway?

It looks like it's only the php5.3 test failing running ~0.6

[robfrawley]

I re-executed it; let's see how that goes. Otherwise I'll but this PR and perform some local tests to determine what's going on.

[trsteel88]

Any luck with your local tests @robfrawley?

[trsteel88]

Hey @robfrawley, how can I help to get this progressed?

[robfrawley]

We need to fix the merge conflicts and resolve the build failures, the latter of which I don't have too much time to figure out ATM. If you can make everything green I'd be happy to include it in the 1.8.1 release, which is likely to hit the streets around 2017-07-01.

[robfrawley]

@trsteel88 Thanks for your PR; an alternate solution to resolve the issue mentioned in this PR has been opened as #958.