reST parser implementation

[takahi-i]

Closes #23

[coveralls]

Coverage decreased (-1.08%) to 89.901% when pulling fd6cc25 on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage decreased (-0.2%) to 90.795% when pulling f66c242 on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage decreased (-0.2%) to 90.788% when pulling be9709d on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage decreased (-0.3%) to 90.639% when pulling fb2bf2e on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage decreased (-0.06%) to 90.918% when pulling 3b0ba41 on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage decreased (-0.02%) to 90.961% when pulling 8764312 on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage decreased (-0.06%) to 90.914% when pulling 00b6b28 on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage decreased (-0.04%) to 90.938% when pulling b7199a3 on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage decreased (-0.04%) to 90.938% when pulling 3167042 on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage decreased (-0.04%) to 90.942% when pulling cd73882 on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage decreased (-0.03%) to 90.95% when pulling 3f053e6 on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage decreased (-0.03%) to 90.95% when pulling d2a285c on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage decreased (-0.03%) to 90.95% when pulling a4e073d on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[coveralls]

Coverage increased (+0.03%) to 91.007% when pulling 569d095 on takahi-i:rest-parser into 00b1676 on redpen-cc:master.

[takahi-i]

Finished implementation.

[takahi-i]

The followings are the known limitation of current reST parser

• does not extract levels of sections
• not support Doctest blocks