Creation of a basic template

It is not supposed to be used... but it could. This is a minimalistic theme
(about 725 lines). In the future, it could be great to based all official
themes on this one.

See #320
Update template

- Logical structure
- Add Comments
- Delete some rules

See #320
CHANGELOG 0.7.1 + TMP_PATH 0.8
Bug "mark all as read" when using DESC order

Solves https://github.com/marienfressinaud/FreshRSS/issues/431
Bug "mark all as read" when using DESC and pagination

https://github.com/marienfressinaud/FreshRSS/issues/431#issuecomment-35710258
Bug "mark all as read" when using DESC and pagination and no scroll

https://github.com/marienfressinaud/FreshRSS/issues/431#issuecomment-35774488
Improve sharing

Previously, the share page can handle only a limited number of shares and only one of each type.
Now the configuration has been change to be more flexible and allows an unlimited number of shares.
The share description is located in an array and the share configuration is stored along with the
user configuration.

Note: I tried to include the specific javascript code in a separate file but I did not succeded to
import it.
Requiert PHP 5.3.4 pour l'authentification par formulaire

https://github.com/marienfressinaud/FreshRSS/issues/432
En attendant de voir si on peut trouver une meilleure solution, si
nécessaire, ou une meilleure documentation
Test si crypt() fonctionne pour PHP 5.3.3

https://github.com/marienfressinaud/FreshRSS/issues/432
Merge pull request #433 from aledeg/share

Improve sharing
Sharing: Compatibility 0.7

https://github.com/marienfressinaud/FreshRSS/pull/433
Show only unread when selecting unread

Before, when there was no unread articles, all articles where displayed. This behaviour was not the one intended.
Now, when there is no unread articles, a message is displayed to alert that there is no article.

See #428
Add a configuration option to get sticky articles

Now the user can choose if an opened article will be repositioned to the top or not

See #338
Merge pull request #435 from aledeg/issue338

Add a configuration option to get sticky articles
Alpha version of Google Reader compatible API

https://github.com/marienfressinaud/FreshRSS/issues/13
Hardcoded passwords, no possibility to add/delete feeds or edit
categories yet.
API: default link to compatibility check

https://github.com/marienfressinaud/FreshRSS/issues/13
API: Better temporary security

https://github.com/marienfressinaud/FreshRSS/issues/13
Slightly better security while waiting for a proper authentification
system
API: sanitize username

https://github.com/marienfressinaud/FreshRSS/issues/13
API streamContents for categories and feeds

https://github.com/marienfressinaud/FreshRSS/issues/13
API: Real password system

https://github.com/marienfressinaud/FreshRSS/issues/13
Expiring token not implemented yet