Added documentation for the Intl component
Fixed quirks in the Intl documentation
Improved Intl documentation based on the PR comments
Added a sidebar about potential deployment problems with ICU
Merge branch 'intl' of github.com:bschussek/symfony-docs into bschussek-intl

Conflicts:
	components/index.rst
[#2312] Minor tweaks for new intl component documentation
Merge branch 'bschussek-intl'