Add license and notice files

[stefaniexin]

License and notice file for source code license. License-binary and notice-binary file for the release version. licenses-binary folder contains several licenses content mentioned in the license-binary file.

[MyXOF]

Codecov Report

Merging #498 into master will increase coverage by 10.62%. The diff coverage is n/a.

@@             Coverage Diff             @@
##           master     #498       +/-   ##
===========================================
+ Coverage   42.05%   52.68%   +10.62%     
===========================================
  Files         585      596       +11     
  Lines       43762    51383     +7621     
  Branches     9653    14846     +5193     
===========================================
+ Hits        18404    27070     +8666     
+ Misses      23560    21571     -1989     
- Partials     1798     2742      +944

Impacted Files	Coverage Δ
...b/queryV2/engine/component/job/QueryJobStatus.java	50% <0%> (-50%)	:arrow_down:
...ua/iotdb/engine/overflow/utils/OverflowOpType.java	50% <0%> (-50%)	:arrow_down:
...tdb/queryV2/engine/component/job/QueryJobType.java	50% <0%> (-50%)	:arrow_down:
...eryV2/engine/component/job/QueryJobFutureImpl.java	44.18% <0%> (-42.18%)	:arrow_down:
...tsinghua/iotdb/qp/logical/crud/DeleteOperator.java	66.66% <0%> (-33.34%)	:arrow_down:
...nghua/iotdb/engine/overflow/utils/MergeStatus.java	66.66% <0%> (-33.34%)	:arrow_down:
...a/cn/edu/tsinghua/iotdb/service/StartupChecks.java	46.66% <0%> (-32.5%)	:arrow_down:
...flow/utils/OverflowReadWriteThriftFormatUtils.java	42.85% <0%> (-32.15%)	:arrow_down:
.../serialize/impl/SimpleTimeValuePairSerializer.java	48% <0%> (-32%)	:arrow_down:
...rialize/impl/FixLengthTimeValuePairSerializer.java	64.89% <0%> (-30.42%)	:arrow_down:
... and 321 more

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[MyXOF]

为什么会有这么多的license？不是应该只有一个Apache2.0吗？

[jixuan1989]

Patent list:

• 201711384490X
• 201810111712.9 *201711322631.5
• 201711319331.1

[stefaniexin]

@jixuan1989 Apache official has different requirements for different distribution ways. Hadoop writes all these statements in one file, that's why it only has two files. But this will lead to very long documentation. A better way to do this is separate these two parts into two kinds of files(binary and non-binary file), that is how spark does. (https://github.com/apache/spark) When distributes source code, non-binary files are used. When distributes release version, binary files are used. @MyXOF We have many pom dependencies. These also need to declare.