[Security][Acl] Issue #5787 : Added MutableAclProvider::deleteSecurityIdentity

Code style fix and documentation typo
adds support for PTY mode
adds convenience method mustRun
attempts to fix tests on Travis
adds cache for isPtySupported()
remove deprecated constraints calls (Min, Max, MaxLength, MinLength)
Fix finder date constraints and tests
Consider KERNEL_DIR setting as relative to the PhpUnit XML file if it does not point to a directory (relative to the current cwd)
[HttpKernel] use static late binding when dumping out container
fixed typos in several translations
updated CHANGELOG for 2.4.0
updated VERSION for 2.4.0
bumped Symfony version to 2.4.1
minor #9684 [2.3] fix typos in several translations (craue)

This PR was merged into the 2.3 branch.

Discussion
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[2.3] fix typos in several translations

| Q             | A
| ------------- | ---
| Fixed tickets | --
| License       | MIT

Similar to #9681, but for 2.3, with one additional change.

Commits
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8209a7f fixed typos in several translations
Changes the form icon in the toolbar to be pixel perfect.
Switched to correct gender of "Token"

The neutral gender "das Token" is used in science to describe an array of bits or chars, where as the masculin "der Token" is commenly used for keys in communications and authentication in the network.

I guess the a CSRF-Token is more a key for authentication then a bit array.
minor #9686 [Form] Switched to correct gender of "Token" (ChristianGaertner)

This PR was submitted for the 2.2 branch but it was merged into the 2.3 branch instead (closes #9686).

Discussion
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[Form] Switched to correct gender of "Token"

The neutral gender "das Token" is used in science to describe an array of bits or chars, where as the masculin "der Token" is commenly used for keys in communications and authentication in the network.

I guess the a CSRF-Token is more a key for authentication then a bit array.

Cheers,

Christian

| Q             | A
| ------------- | ---
| Bug fix?      | yes/kinda
| New feature?  | not really
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | ~
| Doc PR        | none

Commits
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c2bc9ae Switched to correct gender of "Token"
[ExpressionLanguage] throw exception when parameters contain expressions
raising delta on stopwatch as travis really breaks with less than 35
minor #9698 [Stopwatch] raising delta on stopwatch as travis really breaks with less than 35 (cordoval)

This PR was submitted for the master branch but it was merged into the 2.3 branch instead (closes #9698).

Discussion
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[Stopwatch] raising delta on stopwatch as travis really breaks with less than 35

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | well many failing so far because of travis
| License       | MIT
| Doc PR        | no way

Commits
-------

3348c6a raising delta on stopwatch as travis really breaks with less than 35