Support Float::INFINITY in ranges
Merge pull request #164 from tpope/infinity-ranges

Support Float::INFINITY in ranges
Updated minitest to 4.6.2 and RDoc to 4.0.0
Merge pull request #170 from vladson/master

2 gems updated
Added License block to README.md
call the columns hash method
bumping to beta2
Revert issue #99 fixes

There are two commits involving issue #99 which should be reverted.

First of all, #99 is not an issue in Arel at all. Second, the fix provides pretty much destroys the purpose of pagination by cause full table scans.

The original code (it seems I can't simply revert the commits) is 900 times slower than this one.

```
SELECT * FROM (
   SELECT raw_sql_.*, rownum raw_rnum_
   FROM (SELECT "LANCAMENTOS".* FROM "LANCAMENTOS" ) raw_sql_
 )
 WHERE raw_rnum_ between 1 and 30

----------------------------------------------------------------------------------
| Id  | Operation           | Name        | Rows  | Bytes | Cost (%CPU)| Time     |
-----------------------------------------------------------------------------------
|   0 | SELECT STATEMENT    |             |  4636K|  2701M| 23442   (2)| 00:04:42 |
|*  1 |  VIEW               |             |  4636K|  2701M| 23442   (2)| 00:04:42 |
|   2 |   COUNT             |             |       |       |            |          |
|   3 |    TABLE ACCESS FULL| LANCAMENTOS |  4636K|   738M| 23442   (2)| 00:04:42 |
-----------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   1 - filter("RAW_RNUM_"<=30 AND "RAW_RNUM_">=1)

   Statistics
-----------------------------------------------------------
               4  user calls
              13  physical read total multi block requests
       202588160  physical read total bytes
       202588160  cell physical IO interconnect bytes
               0  commit cleanout failures: block lost
               0  IMU commits
               0  IMU Flushes
               0  IMU contention
               0  IMU bind flushes
               0  IMU mbu flush

SELECT * FROM (
   SELECT raw_sql_.*, rownum raw_rnum_
   FROM (SELECT "LANCAMENTOS".* FROM "LANCAMENTOS" ) raw_sql_
   WHERE rownum <= 30
 )
 WHERE raw_rnum_ >= 0

-----------------------------------------------------------------------------------
| Id  | Operation           | Name        | Rows  | Bytes | Cost (%CPU)| Time     |
-----------------------------------------------------------------------------------
|   0 | SELECT STATEMENT    |             |    30 | 18330 |     2   (0)| 00:00:01 |
|*  1 |  VIEW               |             |    30 | 18330 |     2   (0)| 00:00:01 |
|*  2 |   COUNT STOPKEY     |             |       |       |            |          |
|   3 |    TABLE ACCESS FULL| LANCAMENTOS |    30 |  5010 |     2   (0)| 00:00:01 |
-----------------------------------------------------------------------------------

Predicate Information (identified by operation id):
---------------------------------------------------

   1 - filter("RAW_RNUM_">=0)
   2 - filter(ROWNUM<=30)

   Statistics
-----------------------------------------------------------
               4  user calls
               0  physical read total multi block requests
               0  physical read total bytes
               0  cell physical IO interconnect bytes
               0  commit cleanout failures: block lost
               0  IMU commits
               0  IMU Flushes
               0  IMU contention
               0  IMU bind flushes
               0  IMU mbu flush
```
Update test_oracle.rb
Merge pull request #174 from eduardordm/master

Revert fixes involving issue #99 (which makes Arel unusable in large datasets)
ActiveRecord -> Active Record

As per the Rails documentation guidelines.
ARel -> Arel

The project uses "Arel" most of the time, but there were a few "ARel"
here and there. I checked with @brynary back in 2010 to pick one for
the Rails documentation guidelines and "Arel" was chosen and documented.
This patch chooses "Arel" vs "ARel" based on that.
Merge pull request #171 from topdev/master

Added License block to README.md
Updage Gemfile to use https URL
Release 4.0.0