Update README

Fix some typos, added reference to Composer
Merge pull request #79 from flodolo/update-setup-instructions

Update README
Fix TMX file mimetype

This change should be enough to fix issue 8
Merge pull request #80 from flodolo/fix-tmx_mimetype

Fix TMX file mimetype
Glossaire.sh: update single locale

If called without parameters works as usual (update all locales). If
called with one parameters (e.g. 'glossaire.sh fr'), it udates just
that locale.

Also:
* use variables like $release_l10n instead of $local_hg/RELEASE_L10N
and $release_source instead of $local_hg/RELEASE_EN-US when calling
tmxmaker.py
* change from structures like 'if [ "$checkrepo" = true ]' to  'if
$checkrepo' (see
http://stackoverflow.com/questions/3810709/how-to-evaluate-a-boolean-var
iable-in-an-if-block-in-bash)
Merge pull request #81 from flodolo/update_single_locale

Glossaire.sh: update single locale
add flod to credits
Move formatEntity() method from Utils class to ShowResults class to cut duplicate code, update calls to this method in codebase and test.
issue #82 : make entity links in result searches for strings be links to a search for the entity
move jsonOuput method to its own Json class
move bugzilla methods to their own class
create an inString() method in the Strings class + test. Use inString in t2t.php to avoid using strpos() in a closure for better readability
issue 76 - Create a proper download page for TMX files
issue 77 - bugzilla_components.txt created in wrong folder
Merge pull request #84 from tx2z/issue76

issue 76 - Create a proper download page for TMX files
Issue #76 code refactoring
1: use a closure in the loop associated to a variable function to generate rows
2: generate a simpler looking html table
Issue #76
Test the existence of the file on the file system but create a link based on the web server root
Issue #76 force downloads for tmx files
Merge pull request #85 from tx2z/issue77

issue 77 - bugzilla_components.txt created in wrong folder
fix typo